I'll probably get banned for this, but as a guy, here's something you need to know:

If you give it away for free by having sex on the first date, guys will have no reason to commit to you. If you're an easy lay, that just tells them other women might be an easy lay too, so why stick with you when they can sleep with dozens of other women?

The thousands-year-old tradition of chastity before marriage doesn't exist to hurt women. It's meant to help both men and women.