Masochist's Ultimate Demise: The Spiky Cage

“Medieval cock torment, Allie style! It takes about 20 seconds of teasing my sub’s cock through his spiked chastity cage before I realize how much he’s enjoying it. Unfortunately, it’s impossible to cum in that cage, with its sharp spikes that dig in every time you start to become erect. That’s what I thought anyway, so I tease him relentlessly with the reassurance that he won’t come.
Uh, yeah. About that. It turns out it is entirely ineffective at preventing orgasm if the boy likes the pain. Whoops!”