text: Well, for one there is nothing to feel guilty or "dirty" about.  It is something that is perfectly natural.  In fact, there are a lot of animals that do it, not just humans.\n\nAs long as you are not doing it to excess (multiple times a day) or letting it distract you from your day-to-day life, I would not worry about it.  I am a single female, and I do it on average a few times a week.  Even when I am not single, I still wiw it at least several times a month.\n\nBesides, there have been some studies that say it may actually be good for you.  It raises blood pressure and heart rate, and burns off calories.  And the endorphins and hormones released have benefits including the lowering of blood pressure, long-term endorphins that relieve stress, and it can even reduce menstral cramps and migranes.