I had the occasion to work with a woman who had Tourette's. She also used the N word. The thing is, Claudia yelled her ticks sometimes, loudly. One time at a McDonald's, she hollered, "PUUUURPLE N*GGER!" at the black gentlemen wearing the violet sweater, standing 2 feet in front of us.
"Darling." He said. "If you think we n*ggers are purple, then you have a problem".
She was always very apologetic and explained what was going on. He ended up being a really nice guy who had a brother that worked in mental health and was reasonably understanding.
The trip is, she has a twin sister who also has Tourette's, and was institutionalized because her ticks were so bad she would scream, at the top of her lungs and hurt people.
Man, Tourette's is a wierd ass disease. I knew another guy who licked light poles.