You don't think the chemicals released by the brain during sex have any natural function? You don't think that a healthy sex life is a key to good relationships?
If the only purpose of sex feeling good was to make us want to have sex all the time then the planet would be overpopulated in no time flat.
If the only purpose of sex feeling good was to make us want to have sex all the time then the planet would be overpopulated in no time flat.