I enjoy using gags when I want to make the sub feel more out of control or if I am just tired of his ceaseless comments. One of My favorites is to make a sub "self gag". He has to hold something in his mouth. If he drops it (other than to use a safe word) there are consequences.

In general, I don't use gags a lot. I like the verbal interaction with subs in session. Most of the time . . .