you can stretch it out, but start out slowly.
pull it back when you're soft and then work up to getting a full erection in stages.
eventually it will stretch to the point where the foreskin can go back and forth when you're fully erect with no issues at all.
it took me about a month of "exercises" to get it sorted out. my girlfriend loves it because the foreskin is added sensation for your partner--like having a ring on, or 'ribs' of extra flesh moving in and out.
the foreskin is actually a great sexual tool and men with it not only enjoy greater sensitivity but also give their partner greater pleasure.
