so im a fairly large guy- about 8 inches, but thats not the issue. im worried about how my foreskin affects the pleasure i can give to a woman. i masturbate dry by sliding my foreskin up and down (the normal way i imagine) but surely when im having sex my foreskin will stay in the same place and the woman will feel barely any movement from my penis??? am i just being paranoid? can someone advise me? thanks!