How foreskin is removed during intercourse?

The foreskin is not removed during intercourse. The foreskin is a double layer of very sensitive skin that covers and thus protects the glans penis. In the area where it is against the glans penis it is covered with a fine layer of mucous membrane. The foreskin is designed to be able to be pulled back wards exposing the glans penis entirely and then come back to cover it again on its own accord with the aid of the frenulum the ridged band inside the end of it puckers it in such a way as to hold it in place over the head. When you have sex the foreskin is pushed back as a result of the friction of pushing it into the vagina and as the penis moves back and forth so does the foreskin making the movement more pleasurable and less forceful for both male and female.