Wow, are you serious, you must be a female that has no understanding of how a male feels. We don't need porn to masturbate to. Yes, we do it because we want to, and it feels good. It Isn't cheating, and it is normal. Don't be such a prude, lighten up and try it sometime. Maybe You have and you just aren't doing it right, or you were taught it is bad and dirty, either way, don't be so judgemental, I don't think time period have anything to do with masturbation, it has always been here, and always will be. If you are male, you may want to get your testosterone levels checked.