Will excess of masturbation cause erectile dsyfunction?

No: It's excessive when you start missing appointments, class, or other things you need to be doing. For most men, it's a good thing -- a way to learn about your mind and body to prepare you for that one special woman. If you have an obsession with erotica or have trouble relating to others, get some advice from your physician -- a low-dose rx or short cognitive-behavioral therapy may turn life around.