@OP (post#1): I'm a little late in the discussion, but I think the frequent friction with no lubricant could cause some damage. Being bored is probably the reason for doing this all the time. Personally, when I'm bored and depressed, I feel it's the only way to get pleasure, and it could become addictive. The average sex time is about 6 minutes or less. If you can push that to 15-30 minutes that would be awesome. Women need about 18 minutes to orgasm during sex. Four hours edging is way too much in my opinion. It's not just it could be damaging to your physical health (hair loss is something wouldn't worry me too much, I would rather be worry about nerve damaging from friction), it's interfering with your everyday life. Of course you don't enjoy real sex, because no one would be able to do sex for 4 hours. I think you need to take a decision to resist the urge to masturbate. Cutting it gradually. Go from multiple times a day to once a day, then once every two days, .. and so on. I think once (for less than an hour) every 3 days is fine, at least in my dictionary.