How To Move Back The Foreskin During Intercourse?

respected sir,
i just wanted to know that my pennis is samll and my skin is not like what i see in porn movie, its like the skin is not coming back wen i try to do sex, do i have to remove my skin of my pennis,do inform me as i am getting married this time and i dont want to fill insulted infront of anybody.plz advice me and hou much will be the charge for it.plz mail me at YYYY@YYYY