@misterboring Oh, that happens. What I had in mind is stuff like,
I say, "Please do not attempt to get my attention by touching me. Unexpected touches are not only startling but often literally painful."
"They don't bother me," says co-worker, and continues to put her hand on my shoulder at random times when I'm staring down a microscope.
Repeat until I quit.
I say, "The noise that kettle makes is like somebody tattooing "no ragerts" on my cerebral cortex. Please use the other one."
"I don't hear it."
"That's not really relevant. Anyway, I bought you this other one. Please use it instead."
Person continues to use the old one until I steal it and give it to the Sally Anne.