How much is too much?

If that becomes your sex life and it keeps you from having partnered sex, then you're probably doing it too much. I say probably because I'm sure that there are some solitary individuals who lead happy and rewarding lives alone.

If it's something to tide you over between sessions of sex with a partner, then it's not only not bad, but quite the contrary very good. It's important for a man to keep the systems "up and running" and the "juices flowing". Use it or lose it.