Strap on sex toys may be used by either men or women - on either men or women. Men who use strap-ons typically want to play with penis size by using one that's larger than their own penis. Women who use strap-on sex toys typically want to play with gender roles. Porn videos often depict women using harnesses and strap-ons for oral, vaginal, or anal intercourse. But we have received many thank-yous from couples who enjoy having the woman use them orally or anally on the man.