At first, let me tell you how pissed off I was that there's another thread about some guy masturbating. I mean, seriously, please no more. I open the thred to see what it's about, and guess who's knocking on my door? It's my good old friend Master Bates, here to give me a swift kick in the groin.

I think you need to stop masturbating for a little while. You know, like a couple of hours. Give yourself time to build back up. I enjoy doing these activited while waiting:

Going to the movies
Smoking a bowl
Eating.
Looking at my hands.
Taking pictures of naked people(when they don't know about it)

Seriously though, I think you need to stop for a couple days. That should put you right back on track. Otherwise, it might be some sort of wierd medical condition. But I'm pretty sure it's the first thing.