It is used to categorically ban them from donating blood. A new study hopes to propose a more nuanced picture of what gay men actually do in bed. In the Journal of Sexual Medicine , researchers from Indiana University and George Mason University surveyed nearly 25, gay and bisexual men in an effort to better understand how they experience sex. Did it involve kissing, cuddling, masturbation, oral sex, anal sex? Did it happen with a boyfriend, spouse, stranger, or sex worker?