Does it pain while having an intercourse if penis is uncut?
You can stretch the foreskin opening wider to facilitate mobility and retraction. When erect, pull back on the foreskin until some pain/discomfort is felt, but not a lot. When flaccid, pull gently with the fingers in opposite directions on the tightest part of the foreskin to stretch it, slowly and gradually every day. This may take a couple of months to stretch the opening, but don’t pull too hard on it, you can cause damage if you do. Your glans will be very sensitive at first, but will acclimatize with just a few minutes of exposure every day. Don’t let anyone talk you into circumcision. Male genital mutilation, called circumcision, damages the penis and sexual sensitivity and can cause sexual dysfunction. You’re lucky to have a foreskin, an essential part of the penis to enjoy a complete sexual sensitivity in adulthood. Good luck to you.
