Vasher's cock and ball torture
In interlude 10 of WaT Axindweth is using conventional torture methods on Vasher before she gets her hands on a painriel. Since a man's testicles are his most sensitive spot, it's likely that she employed a bit of CBT to achieve her goal. Vasher also implies to her that he's outlasted entire mortal lifespans of people torturing him, and not every society has access to Painriels. that means that there's a good chance that Vasher has had to deal with anywhere from years to decades of cock and ball torture, depending on the time spent focusing on that area. I wonder if he likes it?