when you have an erection, is the foreskin automatically supposed to roll back behind the head of the penis? because mine doesn't. i can roll it back pretty easily, but by itself, it only rolls back to about a third or half way down the head.
No, it doesn't have to retract automatically when you get hard. Some do, but its not needed. What IS important is that you can retract your foreskin manually while hard all the way to fully expose the head. If you can't fully expose the head while hard, or if it painful or too tight, then you need to work on stretching your foreskin so that it can. But it sounds like you can pull it back all the way pretty easily - so you're good to go.
Thanks for the reply.
I have one more question. The exposed head is still very sensitive. I've noticed that it's less sensitive on the bottom and on the sides. However, on the top...it is really sensitive when wet and hurts a little to touch. But I've noticed that if I keep touching it and the head gets dry, it doesn't hurt anymore.
What's up with that?
Normal, totally normal. Keep working with it and exposing it to touch, the more direct stimulation and rubbing it gets, the less sensitive it will be.