I'm 16 and this problem has happened for a year and a half now. I'm male, and I would masturbate, and I'd feel the build up like it's going to come out great. But when I actually ejaculate, I have the muscle spasms, but I don't feel the pleasurable feeling about it anymore. It's like taking a piss.I still feel the pleasure from the build up, but that's it. Nothing special have happened, and I've done some reading on this - a lot of people who have taken SSRIs seems to have this condition, but I haven't taken any SSRIs or other medication for that matter.It's really puzzling for me because it seems like it just suddenly happened. Or maybe the pleasure was less and less - I don't know, and I have a vague memory about it. I still have libido and a sex drive, but the fact that I don't feel any pleasure is driving me a bit frustrated..