I find it hard retracting my foreskin over the penis, especially when erect. Recently however I was able to fully retract it, but this was when it was flaccid and when I was in the shower. However when I have an erection it seems extremely hard to get it over the head. I'm worried about my ability to have intercourse now.
a good thing to do, is look at the sticky at the top of the Men's Health board, regarding stretching a tight foreskin. if you follow the directions daily, you'll be retracting with ease, soon.