You are so right. Sex is a wonderful gift from the Gods. But relationships last when there is a deep trust and friendship. And the right relationship makes living sheer joy. Sex alone will never do that. If a relationship is important, build it on a strong foundation and then, oh wow!
I think it just depends on two consenting adults, so go ahead, and put a limit on how many dates before sex if that works for you.. Me I'm all about the free love, I never push the issue.. Let's be honest here, sex is a part of a relationship. I've had ladies jump me on the first date, and some wait 2 months. You just have to be able to respect sex for what it is...
Women should not have sex with a man as a favor or a job. Why count dates? I believe it happens when you feel very close, passionate and want to experience that amazing feeling. Soul mates may have that experience on their first date. Others may take many more. It all depends. If you feel pressured to have sex, then it's probably not the right time or person.
If funny you broach this Orlando as its a constant topic of debate among me and my single friends.
From my own experience (back when I thought that way) I think most women accept this to be the reality and I think most don't have a problem with it.
These days, I prefer to build something more substantial without having sex cloud the issue... the drawback is that you wait and then find out the two of you are completly incompatible. The pro is that you can take your time, make your decision without sex clouding the issue and if you part, you have a far better chance of parting as friends.