I did have sex on a first date. If the person is good looking and you are hitting it off why not? Protect yourself as long as you both know it is what it is then everything is good... You are both having fun. If things are good afterwards you may just be friends, or F'ing buddies or you just might end up in a relationship. It all depends on what you want and making things clear to each other from jump.
I didn't want to waste time getting to know someone to then have sex and it turn out to be bad. I frankly didn't care if the guy did have respect for me after that or not because I could have felt the same way about them. By not waiting you aren't hurting anyone but yourself if you really look at it.
Some people want to prolong the inevitable, they feel that they should invest alot of time, months into getting to know the person before having sex with them. You finally get intimate and the sex isn't good at all. You have no sexual chemistry. What happens then? How are you supposed to let the person down gently after being with them that long? Are you going to tell them that you should just be friends now after dating all that time? or are you going to stay with them even if you know that is how you are going to feel everytime you get intimate?
Relationships are about more then sex! Yeah that is true, BUT sex is a big part of it. You cannot be in a healthy, happy relationship if the sex is bad. That just doesn't exist. You can have the best communication in the world, be the best of friends but if the sex is bad, you are not going to be happy.
Live, Love and Laugh! Always protected!!!