It might be a double standard, but for me, I don't want it on the first date as a woman, either. I think it takes away from some of the intrigue and the sexual tension by getting too physical, too soon. Of course, if what you are looking for is a physical relationship, then maybe that's not the case. If you're looking for a possible committed relationship though, it's usually wise to wait and get to know the person a bit better. Of course, there are exceptions to the rule. But I do think that there is some truth that men like a bit of a challenge in a woman, they like the thrill of the chase so to speak, and anticipation for the possibility of intimacy (especially if you're really hitting it off) makes it more exciting.
Now, if it's because a guy thinks that a woman is too easy and is judging her by the double standard that it's somehow okay for him to do it but not for her, then screw him...er, rather, don't. Guys who are insecure about a woman's sexuality in relation to his own and men who are full of double standards are probably not going to make the best lovers, let alone the best boyfriends.