Oh, I must have re-named him while you weren't looking.

A little googling has determined that you probably have Weaver Bottom.

Inflammation commonly arises as a result of trauma or prolonged sitting on a hard surface (weaver bottom).

Pain may radiate down the back of the thigh and mimic sciatic nerve inflammation; however, it can be reproduced by pressure over the ischial tuberosity.

http://www.arthritis-treatment-and-r...treatment.html

Can I order a rug for the guest bath?