Face slapping:

You're wearing a blindfold when all of a sudden you receive a brutal slap in the face.

You can feel your cheek glow from the slap, but what is its effect on your mind?

Or you might be ordered to look me in the eye and ask me to be slapped in the face yourself.

I can see the desire in your eyes, smell your growing arousal, and you'll beg me for more.