what do you call that expression ( grinding teeth ) that mistresses make while punishing.

[burrow]

Hey ,

i am a great fan of femdom movies.. I dont like stuffs like strap on ,etc much but i do like caning whipping etc. especially otk punishments. But what i like most is expression that mistresses make while punishing, and its seen only with some mistresses. Like they grind their teeth etc. is their anybody who has same taste ? And if you know such femdom mistresses please quote them. I like mallory of syrenproductions because of this reason

 

[FreeOnes_Adam]

If done well, gritting their teeth can be quite the turn on.