I suffer from a lot of shaft hair. I had always shaved it but last year I tried nair. I wont use it again. Sure it worked a little, but it also ate the sh*t of my penis sometimes. Especially if I left it on too long. When I would try and re-apply it a couple of days later, after the hair started to come back, it only worsened the cuts and sores that it made. If you're going to use it, use it periodically and only on small areas. Also get one for sensitive skin. DO NOT use it on your balls either. After a while, I'm sure you'll realize that the mess and smell of the stuff (which stays in your skin for days by the way) just isn't worth it. I suggest to pluck the hair on your penis and shave or trim the rest. It takes longer but its so much better in the end.