Chronotype, gender, and time for sex

Jankowski, Konrad S.; Díaz‐Morales, Juan Francisco; Randler, Christoph

doi:10.3109/07420528.2014.925470

Cited by 28 publications

(22 citation statements)

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“…Jankowski et al (2014) have shown that there is a general major evening peak of sexual activity and desire in females, regardless of their chronotype. Whereas in males, the greatest need for sex occurred either in the morning or evening hours according to their chronotype (evening types at 9:00–12:00 and 18:00–3:00 and in morning types at 6:00–12:00 and 18:00–24:00).…”

Section: Methodsmentioning

confidence: 99%

Two in a bed: The influence of couple sleeping and chronotypes on relationship and sleep. An overview

Richter

Adam

Geiss

et al. 2016

Chronobiology International

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Objective: To summarize research on couple sleeping with respect to gender-specific differences and chronotype. Methods: Systematic review of the literature. Results: Millions of adults around the world share their beds with a partner. This may be an expression of intimacy and attachment and tends to intensify romantic relationships. Yet, couple sleeping still has underestimated implications for the quality of the relationship, quality of sleep and for physical and psychological health which are not consistently positive. Implications for research and therapy are discussed. Conclusions: Despite the people involved perhaps not even being aware of their nocturnal interactions, it is important that sleeping together becomes a subject of discussion. Abbreviations: REM: rapid eye movement; QOL: quality of life; OSA: obstructive sleep apnea; CPAP: continuous positive airway pressure

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Section: Methodsmentioning

confidence: 99%

Two in a bed: The influence of couple sleeping and chronotypes on relationship and sleep. An overview

Richter

Adam

Geiss

et al. 2016

Chronobiology International

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“…Perhaps because significant correlations have been found between morningness-eveningness and several psychological traits [10][11][12][13][14], the classification of chronotypes has attracted great attention from social scientists. As of February 2016, Horne and Östberg's original publication was the article with the highest number of citations of any article retrieved by the keyword "circadian" in the Web of Science database (produced by Thomson Reuters, New York, NY).…”

Section: Introductionmentioning

confidence: 99%

Variability of behavioral chronotypes of 16 mammalian species under controlled conditions

Refinetti

Wassmer

Basu

et al. 2016

Physiology & Behavior

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This is an author-produced, peer-reviewed version of this article. © 2016, Elsevier. Licensed under the Creative Commons AttributionNonCommercial-No Derivatives 4.0 License. Details regarding the use of this work can be found at: http://creativecommons.org/licenses/by-nc-nd/ 4.0/ . The final, definitive version of this document can be found online at Physiology & Behavior, doi: 10.1016/j.physbeh.2016 Publication Information Refinetti, Roberto. (2016) E-mail address: refinetti@circadian.org (R. Refinetti). AbstractHuman chronotypes (differences in preference for early or late rising each day) have been extensively studied in recent years, but no attempt has been made to compare human chronotypes with the chronotypes of other animal species. We evaluated behavioral chronotypes in 16 mammalian species along a body size gradient of five orders of magnitude (from mice to cattle). Individuals of all species were studied under a 12L:12D photoperiod in a thermoneutral environment with food and water available at all times. Rhythms of locomotor activity were analyzed for onset time, acrophase, and robustness. Neither of these rhythmic parameters was significantly related to body size, but onset time and acrophase varied considerably from species to species, thus characterizing diurnal and nocturnal species. Chronotype spreads ranged from less than an hour in sheep to almost 24 hours in cats, thus extending both below and above the human chronotype spread of 6 hours. The variability of chronotype (as quantified by the standard deviation of group means) was much larger between species than within species and also larger between individuals of a species than within individuals on consecutive days. These results help situate the matter of human chronotypes within the broader context of variability in the phase angle of entrainment of circadian rhythms in animals.

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“…In general, the majority of sexual encounters take place at bedtime, that is, people begin to sleep after having sex, while some of the encounters do occur during the daytime [45]. However, approximately 20% of sexual encounters take place early in the morning [46]. It is reasonable to assume that REM sleep-related erections have a function of recreation, such as resolving marital conflict.…”

Section: Sexual Intercourse With Nptmentioning

confidence: 99%

Why Do Healthy Men Experience Morning Erections?

Youn¹

2017

Open Psy. J.

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Abstract:People begin the sleep cycle with a period of non-rapid eye movement (NREM) sleep, followed by a very short period of rapid eye movement (REM) sleep. During a normal night of sleep, humans usually experience about four or five periods of REM sleep. Penile erections have generally been considered to be an epiphenomenon of REM sleep-related physiological changes for healthy males. Thus, men are very likely to awaken in the morning with a REM sleep-related erection, which is also known as nocturnal penile tumescence (NPT). Men who are physically under great strain or serious psychological stress may find it difficult to maintain a psychogenic erection. The best time for them to have sex would be during sleep time, such as when they are experiencing REM sleep-related erections. It is reasonable to assume that the NPT phenomena might have evolved as a tool for having sex, in the context of both procreation and recreation.Keywords : REM sleep, Morning erection, Nocturnal penile tumescence, Sexual intercourse, Procreation, Recreational sex. REM SLEEPMammalian sleep consists of natural cycles of activity in the brain and has distinct states: rapid eye movement (REM) sleep and non-rapid eye movement (NREM) sleep which consists of Stages 1 through 3 [1]. Typically, people begin the sleep cycle with a period of NREM sleep followed by a very short period of REM sleep. Dreams generally occur in the REM state of sleep [2,3]. Usually, REM sleep occurs 90 minutes after sleep onset. The first period of REM typically lasts 10 minutes, with each recurring REM state lengthening, and the final one lasting up to an hour. That is, the proportion of REM sleep in total sleep time in humans increases as morning approaches. During a normal night of sleep, humans usually experience about four or five periods of REM sleep. REM sleep in adult humans occupies approximately 20-25% of total sleep, or about 90-120 minutes. Some people tend to wake, or experience a period of very light sleep, for a short time immediately after a bout of REM [2 -6].There are many theories about the functions of REM sleep, but they are not understood well. It has been hypothesized that the REM state serves a sentinel function, bringing about a brief, but periodic, awakening after preparing the organism for immediate fight or escape [7,8]. That is, REM sleep activates an animal periodically to scan the environment for possible predators. Such a built-in physiological mechanism presumably would provide maximal security from external danger compatible with minimal disturbance to the continuity of sleep. Apparently, humans are more alert when aroused from REM sleep than NREM sleep [2,8,9]. Many researchers argue that REM sleep serves an important function for the survival of mammalian and avian species. In both humans and experimental animals, REM sleep loss leads to several behavioral and physiological abnormalities [2,8,10,11]. In addition, some researchers state that REM sleep may function to influence and promote social bonding or attachment in the develop...

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Chronotype, gender, and time for sex

Abstract: preference was more strongly related to the timing of need for sex than to the timing of actual sexual activity (r = -.275 vs. r = -.174), while the timing of desire and the timing of sexual activity were positively, but moderately related (r = .320).

Cited by 28 publications

References 29 publications

Two in a bed: The influence of couple sleeping and chronotypes on relationship and sleep. An overview

Two in a bed: The influence of couple sleeping and chronotypes on relationship and sleep. An overview

Variability of behavioral chronotypes of 16 mammalian species under controlled conditions

Why Do Healthy Men Experience Morning Erections?

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