This thread is for women please.
Inspired by the 'opposite genitals' thread, I'm going to ask the more specific questions to my lady friends:
How old were you when you first saw an erect penis in the flesh? What were the circumstances and what were your thoughts?
As for me, I was somewhere around my 14th birthday. It was with my boyfriend. I was a HS Freshman, he was a Senior. We had been dating for a bit and we had several back-seat make-out sessions under our belts by then. I had rubbed his cock through his jeans prior to this and he had fingered me with his hands inside of my jeans and panties. We were parking and he was trying to get inside my pants and was having a hard time. I was wearing some painted-on Gloria Vanderbilts. I pushed them down a little so he could get access and they went down further than I intended. I think he took that as an invitation to take his cock out, which he did, pushing his own jeans down.
Of course I looked!
My initial reaction was "Jesus fucking Christ that's huge!" I swear, I was thinking, wait, that's supposed to fit inside of me? It hurts putting in a tampon, how the fuck will that fit? Almost immediately after was, it's kind of cute. It was circumcised and smooth, which to this day is my preference (I don't know if that was formed by my first or if I just like it better that way. Chicken/egg). I touched it, of course, and was intrigued at how good the skin felt. So soft while the cock itself was so hard.
I gave my first hand-job that night.