Gorilla
/When I was about 8, I was hanging out with my friend who was about four years older than I was.
All of a sudden, she looked down and said, "Oh my God, you look like a f*cking gorilla with those hairy arms!" and broke into hysterical laughter.
I'm 16 now, and so self conscious about it that I won't leave my house without making sure most of my arms are covered.