When I was a kid, about 6-21, I could get my cock in my mouth the whole way, and so could a few of my friends, so I always thought it was really normal. Now I'm older I can only get the head in my mouth and that's only if I've eaten sensibly (i.e. no stomach) and been to the gym, so I'm flexible.
The best sex I ever had was about 9 years ago in an old house by the sea in Sussex one summer night. There was one guy sitting on the sofa. I sat on his cock facing the same way as him, then another guy stuck his cock in facing me so I was being doubled. Then I sucked myself off at the same time while another guy chewed my balls.
NEVER has sex been so good since.
I used to love self suck parties, with about 8 guys in a ring sucking themselves off. But nowadays people are too bloody boring.