initially sex was for procreation but as a consequence of mordernisation, it has evolved beyond thinkable propotions.now there is anal sex,oral sex, masturbation, vaginal sex, "protected" sex, premarital sex etc nothing is out of the question, it dependes on who you are!!they all serve the same purpose, relieving sexual pressure through pleasure.
your experts are still stuck in the dark ages!! they think sex is exclusive to heterosexual couples! gays can also have oral sex just like "straight" people can have anal sex!
those who don't use their freedom to fight for their freedom will lose their freedom!!