When I was about 12 we boys created a chart for the JUMPING TITIES where we would give each girl at school a rank while on sport class. For example, Tini was JT1 (jumping tities #1). The girls heard about it and made their own rank: JB (jumping balls). I was nominated JB #1...and I didn't have the slightest notion what it ment.
When I was about 13 a fat girl at school, Sara, grabbed my cock at the swimmingpool with her hand under the water. She said: Wooops, sorry...!!!
Some years ago in college a gay friend of mine (actually we aren't close friends) was heavily drunk and we were talking about something. He was so horny and high that he looked at me hungrily and suddenly grabbed my penis and squeezed it. I got hard in an instant (i'm straight but when someone touches my cock it GROWS), he smiled and said: "WOW, WHAT'S THIS?". I got angry and told him to let me go, he went away unwillingly and left me there with a boner...
Once a girl did about the same. Just because I wasn't talking to her she pushed me onto a couch (in college), in the middle of the building, leaned against my body and grabbed my cock till I was hard. Then she left, with a triumphant smile on her face.

Hi! I'm 28 years old and only had sex once in my life. It was with a whore when I was 19, I went with a friend of mine, each one chose one woman and we agreed to meet after we'd done it. I didn't choose her specifically, she was plump and not particulary attractive. I came in and she asked me if it was my first time (I said yes). Tried to kiss her and she told me to stop, the sucked me with difficulty till I was hard then begann to ride me. I did what I saw in movies, I was unexperienced. I'm athletic so I started to ram her hard and fast, like I saw on porn, each time penetrating her with my whole length...I seemed unconfortable to her, she begann to moan ans scream and asked me if I hadn't cummed yet. We changed positions and I fucked her ass...she asked me again I told her I didn't cum yet so she pleaded me to stop. She told me to jerk off 'cos she couldn't take it anymore. I paid what i owned her and did what she asked; it seemed the time had passed away very fast, I did her for about 45 minutes! I discovered my friend had already gone home, so I took the bus, confused.
Like I said, I didn't know anything, I don't know if I'm too big or what actually happened! All I know is she couldn't take it...