[nehan doesn't even bother making mention of the man's reactions, because they don't matter, in this moment.

he does let go though, and replaces his hand with the crop, slapping it lightly against the swell of his backside.]

You can go as hard as you want on the backside, it's fine, if your client wants to not be able to sit down for a while. Here, however... [nehan raps the crop higher, in the small of the back, and draws it up the spine.]

The back is your best target. This is where it will truly hurt.