So I have this darkish, black spot. I have had it for a couple years and never thought about it. However, I am starting to see another one and I have been told it can happen do to over masturbation/sex. Im wondering:

1) If what I was told is true can I stop it some how?

And

2) can I get rid of it somehow? It is a bit embarrassing and really more to the point is I don't find it really attractive.