Studies among gay men have indicated that percentages are similar when comparing men who prefer to penetrate their partners to those who prefer to be the receptive partner. Two men engaged in frotting by rubbing their penises together Some men who have sex with men, however, believe that being a receptive partner during anal sex questions their masculinity. There are a variety of non-penetrative sex practices. Frot is a form of male-male sexual activity that usually involves direct penis-to-penis contact.