Recreational marijuana continues to be legalized in U.S. states, with popular media discussing connections between cannabis and the facilitation of sexual activity. We conducted two surveys with adolescents and college students in Washington state to examine the role of viewing social media and pro-marijuana content on sex-related marijuana expectancies and intentions to use. In Study 1, among adolescents (N = 350), we found connections between social media use, exposure to pro-marijuana content, and sexrelated marijuana expectancies, with boys' sex-related marijuana expectancies predicting intentions to use marijuana. In Study 2, we expanded this research to college students (N = 966), with the addition of frequency of marijuana use as an outcome. For men, sex-related marijuana expectancies were negatively associated with marijuana use. Sex-related marijuana expectancies were not associated with intentions to use or use of marijuana among adolescent girls and college women. Our findings highlight how social media use is associated with increased exposure to pro-marijuana content for adolescents and college students, and how such content is associated with sex-related marijuana expectancies. The mixed relationships in our data between sex-related marijuana expectancies and intentions and use highlight potential gender and developmental differences.

The current study explored the influences of advertising exposure, numbers of marijuana retailers, distance to retailers, and constructs from the integrative model of behavioral prediction, including outcome beliefs, perceived norms, and efficacy, on youth's intentions to use marijuana in a state in which the use of recreational marijuana is legal. A statewide online cross-sectional survey of 350 adolescents ages 13-17, residing in Washington state, was conducted in June 2018. The results of the regression analysis suggest that exposure to marijuana advertising, positive and negative outcome beliefs, and perceived peer norms were associated with intention to use marijuana. Distances to retailers moderated the relationships between exposure to advertising and intentions, as well as between positive outcome beliefs and intentions. States that have legalized recreational marijuana should continue considering the location of retailers in relation to neighborhoods and advertising regulations to reduce the appeal to youth. Additionally, prevention efforts could aim to influence outcome beliefs and norms in an attempt to reduce adolescents' intentions to use recreational marijuana.

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