the Dreaded BENCH

Oh, the bench (or box or horse).
The anticipation and trepidation as you wait for him or her to enter, knowing that you will soon be prone on the bench, tied down, and your bottom will be beaten mercilessly while you are helpless to do anything about it.
Oh my....
Sometimes she beats you on her lonesome, sometimes she brings a helper:

Sometimes you aren't quite naked, as your underwear gets tugged down after you're restrained, and you're allowed to keep your socks on, in case your feet get cold .... heh.

Or she likes to have you naked, and restrained, and on tip toe, while she applies cane stroke after cane stroke.

Once in a while, she does not restrain you at all.
She puts you over the bench, and warns you that if you struggle or try to get up, then she WILL restrain you, and give you double strokes.

Sometimes, she puts a batch of nettles under your belly before tying you down on the bench, then calls her friends over for a spanking party.

Other times, she's in the mood to show her friends how to deal with an errant husband, and naked, you go over the bench for harsh bare bottom punishment while they watch and giggle.

Or she takes you down into the basement, and shows you the homemade bench she had made.  You strip, you mount the bench, she ties down your knees, waist, and wrists, and she beats your bottom hard, knowing that no one will hear your screams from down there.