I found a new way to masturbate that feels great on my cock, thought I'd share. It's more for circumcised cocks. Put your hand at the base of your penis, then pull all the skin upwards towards your head. You should have a wrinkly bunch of skin bunched around in between your hand and your corona. Take the finger of another hand, and use lube, unless your skin is soft enough, and gently rub the center underside skin that is bunched up, where the stimulation is most sensitive. It takes longer to cum, but feels amazing.