I just like to masturbate, with or without my wife being there. Last night was mutual masturbation, this morning solo. Other times right after sex, I'll jack off again over her tits. So to answer the question, yes!
Yes and all of the above I have always needed some alone-time to get in touch with myself so-to-speak. But then there is nothing more erotic to me than to share the intense pleasure openly with a fellow masturbator.