You train? Your cat?? In this house, it's more like my cat trains me😭 but yes, very relaxing. I'm sure my cat thinks I'm creepy as I love staring at him while he licks that one wet spot over and over again.
Urgh, i had a girlfriend with an old basset type dog who would neurotically lick his paw until it was red and raw on top. So at night, slurp... slurp... slurp... slurp... slurp...
I'm sure I'll get canceled for this, but I broke my dog of this habit by just smacking her whenever she started. Nothing that would hurt or cause a bruise, but if she's doing that (or humping a pillow, or any other stuff like that) I'd give her a light smack and she'd stop. She also has her own pillow that she's allowed to suckle when she gets overstimulated, so she has some outlet, just one I approve of. After a few months she mostly stopped with the neurotic licking.
Pretty sure you can do the same by just like, poking them or shoving them a bit. The point is just to interrupt the behaviour and eventually their habit should break.