Just stop beating it so much. I beat roughly 14 times a week, give or take 1 or 2. Bottom line is that when I've got a gf, I just don't beat it at all. That is unless I just feel the urge to some time or if we didn't see each other for a long time. But I always felt like busting w/my SO took a lot more out of me, and then I didn't want to masturbate at all really, unless I just wanted to get off to the thought of another girl.