Does anyone have any experience in dealing with stud tail? I'm fairly sure that my boy has it as he seems to have permanent greasy patch at the top of his tail. The skin seems ok, and I don't think that it causes any pain as I brushed it without him flinching or complaining, but it is very greasy and can have a slight smell.
He was neutered late because he had a retained testicle as a kitten. I noticed that he was a bit greasy on his back a while ago, but assumed that it would clear up once he was neutered. It's been a few months now though, and he still has it.
Ive ordered some sebolytic dermatological shampoo and plan to pin him down and try to wash his back and tail when it arrives (which I'm really not looking forward to!) 
Just wondered whether anyone else had experienced this and how you dealt with it?