I'm suffering from phimosis by birth, so generally I masturbate without retracting the foreskin of penis because it hurts. Yesterday I just tried to masturbate after fully retraction of foreskin (by using coconut oil), it gives me pain but the main problem is that while masturbating I feel that I'm not able to sustain the sensation for long time. Through I would not ejaculate but it is pretty tough for me sustain the sensation on penis for more than 2 minutes & that's why I'm not able to even rub my glans properly. Why is this happened to me? & I thought that even I'm not able to do masturbation properly after retraction of foreskin how should I do intercourse. What should I do? Please help me. I'm very upset from last night.