The tone of voice you unwillingly use on the phone when you're trying to jerk off to the other person's voice or to muted porn (because what he/she is saying is too boring for you to care).
Rich: *Shaky voice* Yeah... Uhuh... Eheheh. Cool.
Alisa: Are masturbating to me?!
Rich: HUH!? No! Why???
Alisa: Because you're using masturbatone... Ew.