NEVER sleep with a guy on a first date - all the women Ive ever been with, Ive never stuck with one that slept with me on the first date. Ive never been pushy for sex, but they generally were making it obvious thats what they wanted. I have to say I lost interest as there was no build up of the tension. The women who gradually let me get close them - they drove me wild! in a good way :-)
I make it a point to never sleep with guys on a first date. Or any date!
I slept with a woman on the first date. And still called back. Although, I think most women who would are easy. So, I see your point.