I asked my esthi friend who does all my ensmoothening, kinda figuring it would be just "a handful of asshole dudes ruining it for everyone" but it turns out no: apparently because the skin on the balls & around the base of the shaft is so thin and elastic, it's extremely easy to cause serious injury (the word "tearing" was used in ways that made my eyes water, and I don't even have that anatomy...). Most beauty schools don't even teach it for safety reasons, so people just don't know how to do it. A friend of theirs is a guy specializing in it, and apparently he's booked out months in advance because of his reputation for doing it without bruising his clients.

The more you know, right?