I am an 18 year old male and I love to masterbate under a condition, the foreskin should be pulled. It is an absolute sensation but I have a few problems. Once I pull my foreskin the penis automatically erects and since the shaft comes in the way it refuses to go back to normal state. The foreskin does not go back and the only way it can is if I masterbate twice. It gets stuck on the shaft if I retract it, it goes back and I cant pull further its very hard.