We have all been there....our eyes meet and begins the dance of cruising. Presto, your in bed having amazing hot sex. Cuddling follows and you start fantasizing about your future with your man.
You an your new found friend are in a complete state of HYPNOSIS! Especially if it was good sex.
So whats the problem, you may ask....I'll tell you...
When you have good sex with a person on a first date you build very powerful and strong associations and identifications with the person you had sex with. Your body and brain are flooded with feel good chemicals and you naturally associate those feelings with that person.
Which means that your judgment and ability to evaluate who this person is and if this person is really the right person for you.
While sex is a very good way of getting to know someone, I would gently suggest you leave it for the 3rd date.