I ve been feeling these exact same symptoms over the last few weeks. When I masturbate, I normally try to delay ejaculation as much as possible to extend pleasure. I do not masturbate violently at all. It s usually gentle, with short breaks whenever the feeling of climax comes up. However, when I m ready to ejaculate, I do speed up the motion considerably. But recently when I get to that point and ejaculation takes place, I get this sharp cramp-like pain in the left side of my lower abdomen... actually, it happens right where my abdomen folds over my hip, about six inches to the left of my belly button (my left). A few seconds after ejaculations, the pain fades