Homosexuality, Male 40 Humans 40 Male 40 human 40 male 40 male homosexuality 40 adult 32 Adult 28 psychology 26 Human immunodeficiency virus infection 22 HIV Infections 21 Young Adult 20 young adult 20 sexual and gender minority 18 sexual behavior 18 Sexual and Gender Minorities 17 female 17 Sexual Behavior 15 article 15 Adolescent 14 adolescent 14 controlled study 14 major clinical study 14 Bisexuality 12 HIV 12 bisexuality 12 men who have sex with men 11 Female 10 statistics and numerical data 10 Human immunodeficiency virus 9