I'm new here, and I'm glad that you like self suck!
It's not a question of have a big dick, and you don't have to be a gymnastic!
I don't have a big cock, and I'm a little fatty, and I Can Do It.
you have to practice a lot, but when you reach the cock is an amazing sensation. I don't do it very often because don't hurt my back, but I do it quite a time.
otherwise see a shemale do it, is much more pleasure
