I've tried quitting either for years, very much addicted. Or at least a very strong coping mechanism.

If you're anything like me, it's more or less impossible to quit one and have the other. Watching porn will eventually lead to masturbation and vice versa.

I've recently tried taking the half-measure of exclusively audio pornography (/r/gonewildaudio) - in an effort to see if I notice any changes in my perception of women or anything. Been on it exclusively for a few weeks now and I feel the same. If anything, I'm more tired since it takes much longer without the visual stimulation.