guys, do I give the wrong impression sometimes?

Today I decided to talk to some females in my PE class I decided to take over the summer. This conversation took a turn though, as they all started to say perverted things, rub up against me, and offer some sexual favors. Now I must wonder... what the hell did I do to start this? I came over and acted nice and boom. Is it the fact that I'm not that bad looking, the speech impediment that sounds like a German accent, do I have a nice personality, or are the women I know in real life just a tad easy? I'm confused. lol
the most confusing part is that I just met them today, and they had known me for only 2 hours... I mean eek.
the most confusing part is that I just met them today, and they had known me for only 2 hours... I mean eek.