I've just started in the online dating thing and I've noticed how many of the women answer that it will take 6+ dates before they will have sex with a guy. The best I can figure is that they do that so that when it happens after 3 or 4 dates the guy will think that they are special. Which is bizarre because ALL guys think that they are special. Women who think that the guy 'wont respect them' if they have sex after only a couple of dates because they are giving the impression that they will sleep with just anybody forget that no guy thinks of themselves as just anybody. Every guy thinks that if a girl has sex with them it was because their game was just completely irresistible.
Frankly if it really takes 6 dates you are destined for the friend zone. Women do not need 6 dates to make up their mind if you are good enough. If they haven't seen what they want in 3 or 4 dates the chances of their being some sudden revelation about you in date 5 or date 6 is tiny.
I don't like putting a timetable on things but if you are not seeing some escalation in physical contact (French kissing, grinding, ass caressing etc.) by the end of the second date it is likely going for the friend zone.