Considering this boy thinks that he knows what a girl wants sexually simply by her dress and "jestures" I think he has quite a bit to learn about women.
Just because a woman wears a short skirt and low cut top and is flirting with you doesn't make her a "slut" or ready to go home with you.
You stated that you like the "slutty" girls and you wonder why you get teased....well, let me clue you in....women have evolved from the days of sexual slave....we can decide who we want to sleep with and just because we flirt with you and you buy us a drink does not entitle you to a free f*ck. Not to mention, our bodies are OUR BODIES and if we want to show them off, so be it. That also doesn't entitle you to a free f*ck. Screwing with the head of a neanderthal like you is sometimes fun because (of your overgrown ego) you think that every girl who smiles at you automatically wants to drop down and suck your d*ck. The fact that most women don't return your affections should clue you in.