As a person that has experienced and seen my erections get weaker over time and has masturbated for long time, I can say that wolf is ignorant and dumb.
I remember a few years ago, I stopped masturbating or even thinking about it for a week and at the end of that week I was able to maintain and have strong erections. This was all due to me not masturbating. If that's not a sign that overmasturbating can cause impotence, I don't know what is.