My parents had me quite young and when my Dad would pick me up from high school, some kids thought that it was my boyfriend.
I think this also may have led to guys not approaching me, because they thought I was dating the 'hot' guy, with a hot car who was dropping me off at school. A lot of my friends also had crushes on my Dad, which they had no problem telling me about.
I also remember bringing a guy friend home once, who was about 18 when I was about 13 and he was chatting to my Mum while I got some stuff together to go out. When we walked out, he said 'who the hell was that, she's hot' or something similar....and I said, my Mum, and she's pregnant!!!
It was just an all too traumatic teenagehood for me!