learning not to say SHOULD (cane)

I have a dominant personality, and it surfaces in our relationship at times. It might be related to the work i used to do, and also my lifetime activity of officiating sports and coaching teams.

Thus, I sometimes say how something should have or should NOT have been done,

instead of phrasing it:
It might have been better if you had avoided such and such... as opposed to
saying bluntly: you should not have done that!!!

I do not realize I say this, but Cindy being upset with my saying should gets brought to my attention in a memorable way.

I had stated this maybe 20 minutes before, when Cindy entered the room where I was in, took a ruler out  of the desk, and told me to lower my pants and bend over. This was a plastic ruler, and although it did make my skin somewhat red, it was not really felt. She stopped after a little while, and I apologized and thanked her.

A few minutes later, while getting ready to go out, i stated that the spanking was not felt, and she MIGHT (not so slow a learner) want to use the cane to be more effective. It only takes a minute, and it WORKS! Cindy agreed.
Bare bottomed, bent at the waist with arms extended onto the bed to support me, Cindy gave maybe twenty quick short cane strokes, that were very effective.
I once again thanked Cindy for the spanking, and the problem is solved for now. Cindy's normal cane strokes are like the black haired lady in the gif below.. They are effective

Today, I definitely avoided the word SHOULD!!!

Slow, hard cane strokes are really effective, as are string rapid fire strokes
bottoms up
Red