Fellatiotone is the extreme muscular development that occurs when someone gives a lot of head. In developing fellatiotone the giver often feels muscular tiredness in the cheeks
and a stiffening in the jaw. This passes once true fellatiotone is achieved.
Julie: "Gee whiz my jaw is tight and my cheeks
Zoe: "Girl, you need to work on your fellatiotone. Once you get to be as good at giving head as me, your fellatiotone will be awesome!"