I don't think it's a conventional form of therapy, but a specially tailored one for a specific issue.
I know a lot more about bdsm than I have any need to thanks to this friend. It's interesting to a point, but half the time I just go "why would you do that?"
It's funny. My friend was just talking about this book on bdsm he's reading and how there's a section about spanking-related therapy someone went through to get over some spanking-related trauma.
Where I'm from, when you go over 21 you just say "bust" or "I busted." I so totally would have gotten that reference for sure without question undoubtedly.