A-Silly to really put a number on it. It'll happen naturally, it doesnt matter to me if its the first date of the 50th, whenever it feels right. I don't recognise the love her=wait and just for fun=right away distinction, I've been with girls and waited ages before we had sex and it never meant anything to me, but on the other hand i slept with my long-term g/f on the first date. So, for the sake of brevity ( ), whenever it feels right, no specific number.