I don't usually get into discussions about religion. But someone said it best, it depends on the religion. Raised as a Catholic, I think I remember being told that premarital sex, oral sex, and masturbation is a sin because it deals with lust. However, in this day and age, it is done anyway but that doesn't mean that millions of sex crazed individuals will have a reservation to hell. In fact, my very first girlfriend that I had after moving to California, used to preach to me how premarital sex was such a sin and that I should never have sex with any woman until we've walked down the aisle of matrimony. However, that didn't seem to stop her from banging my brains out for several years (as bf/gf, friends, and lovers).