We have all sorts of unwritten (or written, in some cases) "rules" about sex, like that you can only have one partner at a time, etc. It's taking a fun game and ruining it by putting referees all over the place. Now we've got a industry of daytime talk shows and magazines to ask us "Is your sex life normal enough?"
In some cultures nobody gets jealous when someone has sex with their partner. (perhaps it could be considered a compliment!). Swingers were the norm is Eskimo society. Yet in our society, the main cause of divorce is different sexual needs - when one needs more than the other. The obvious way to solve this problem would be to let whoever's still hungry after dinner go to a restaurant - not split up the whole family and leave the kids suicidal.
People are formed by their environment - for example, some Muslim women considered not wearing a veil to be "naked". When some countries outlawed the veil, these women literally never left their homes. They're probably still there.
How on earth could a human being be considered cheap, or expensive for that matter? Aren't all people priceless? (Not according to capitalism, of course. What's your net worth? That's how much property you own. A person you doesn't own is "net worthless" - though that's not a common title for business magazines etc). Presumably the value of a woman is measured in her ability to deny sex, (ie: prostitution) just like the property owner's net worth is grown by denying others access to his property without making an unfair (profitable) deal. Though no possessive father would admit it, the ancient lie that females are property, lowered in value if they lead free sexual lives, is alive today. Every time someone says the word "slut" they are making a contribution to the age old tradition of females being rape-slaves to those with property. It may not be exactly the same as today, but as I said before - what can be reformed can be deformed. We must forget forever this propertyist system, which can, and most likely will, return to its ancient incarnations at any time.]
Sexual freedom is closely linked to other freedoms. If leaders who start by burning books end up burning people, leaders who start by barring passions end up barring souls.