You shouldn't hurt yourself man or you will damage it, some men don't retract fully because the frenelum, can't spell it, on the underside of the penis (that tiny bit of skin), that goes from nob head to shaft dosen't seperate and causes tightness, give it a year or something and if its not sorted go to a doctor and get it snipped under local anathetic, you certainly don't need a fucking circumsion man, that's like the very worst case senario and its bascially never done.