A few thoughts here.

It's not uncommon to see depilation listed under services offered on a domme's website. I've always assumed it was by way of waxing done in a manner designed to cause the most pain possible grin

It's pretty common for spas/salons to offer male waxing (Google is your friend)

It's funny you should bring this up. I've often fantasized about a multiday sentence to a remedial slave training facility and imagined this would be part of the various intake procedures.