Hi. I am 18 yrs old. My cock is 4-5 inch large. But when I try to push back the foreskin it is coming back. But after masturbation when I try to pull it upwards its somewhat difficult. And when I try to touch the penis head,I.e the oink colour part it is somewhat uneasy and it makes me not to touch it. It is not paining but it is uncomfortable. How can j do sex with these problems?