“…With regards to sexual motivation, adult LBN male and female rats spent more time with a sexually receptive female or sexually vigorous male, respectively, compared to controls during the no-contact phase of a partner preference test in which they had to choose between a same sex vs opposite sex partner [ 333 ]. Moreover, adult LBN male rats exhibited altered copulatory behaviors including reduced latencies to mount, intromit, and ejaculate at earlier timepoints than controls over a 3-week period [ 334 ], although the frequency of these behaviors did not differ between adult LBN and control males [ 333 ]. In adult female mice, LBN delayed sexual maturation [ 335 ].…”