Picture for reference. I'm 17 turning 18 very soon.

http://i1089.photobucket.com/albums/...Untitled-3.png

I don't know what they mean by non-threatening, but apparently girls and guys have no problem being completely open with me after first meeting me. S***, just the other day I met these two girls and I asked for a ride home as a sort of joke because it was raining. I had known them for less than 20 minutes and she let me get in her car and drove me home while the other waited at the store. Another girl I hadn't known for a little while made me help her with clothing and made me critique how she looked...in really, really revealing clothes. Is this just normal stuff? Somehow I feel girls I barely know shouldn't be so comfortable around me.

Does this mean I'm going to have a harder time making girls take me seriously, or affect my chances of being in a relationship?