I can't tell you that they expect it, because a first kiss is situational.
I've had first dates where the girl kissed ME within the first 15 minutes, where I've had makeout sessions within the first hour and most recently, I had a date with a woman who I didn't kiss on the first date.
It all depends on what is going on during the date, but my general rule is that I do NOT go past the 2nd date (assuming you get a 2nd) without going in for a kiss. Some women will try to put up a holy act about how they are so saintly and don't want to seem like they don't put out too easily, so they'll try to keep it clean the first date. Then on the second, it's do or die. If by the end of the second date, there isn't a kiss... NEXT... simply because I know I'll be LBJFed.
You HAVE to show interest but again, as one poster said: There are no absolutes. Everything is situational.
Just go with the flow and go for it when you feel is the best moment to do so.
To be honest, so far, my best dating experience with a plate... was a first kiss on the second date, and a makeout session on the third. But this, might not be the case for you.
YOU'RE the one on the date so only YOU can truely gauge what the situation at hand is.
I wish I could be more help but I just don't want you thinking that by the end of the first date you HAVE to go for it, because then you'll just spend 2 hours thinking about when is a good time... and if it doesn't happen, you'll be bummed out.
