for me it was when i was 10.
my parents took me to the zoo and we were in the monkey area. i dont know where my parents had gone, but i found myself alone watching the monkies.
this one monkey came closer to the bars, probably about 10 feet from me.
anyway, it was a smart monkey and when i stuck my tongue out at it, he stuck his tongue back out at me. we started to mimic each others behavior, like a game.
anyway, after a few minutes he suddenly started jerkin his gerkin. being only 10 i though this was part of the game. so i took off my pants and started doing the same thing.
he was shrieking like a wild monkey and jerkin really hard. so i tried the best i could with my 10 year old vocal cords to shriek like the monkey.
anyway, people started to gather around and im sure they were saying things but i wasn't paying attention.
the monkey blew his load and so did i. when i turned around some of the women were crying and some of hte guys were laughing.
then i saw my mom come running through the crowd. she was soooo angry and told me to 'PUT YOUR PANTS BACK ON!!!!"
all i said was 'mommy, the monkey made my weiner spit.'
i miss the zoo.