When I was living on the streets for a while another of the homeless people had severe OCD, he had a compulsion to clean things if they were dirty. He was a huge man, solidly built, usually shirtless, covered in tattoos and piercings, shaved head. He looked really scary but he was actually a really nice bloke.
People in the homeless centre were used to him, quite often he’d come in and ask to borrow a bucket and a cloth so that he could clean something. The police were used to him too. I watched a drama unfold there one day, a car parked out the front of the homeless centre was really dirty, he started cleaning it.
Halfway through washing the car the family that owned it wanted to get in it and go home, but he hadn’t finished yet. Police calmed the family down and told the bloke with OCD they wouldn’t take him to the lockup if he finished really quickly. Putting him in the police lockup overnight wouldn’t have upset him, he’d enjoy having a proper bed for the night. Not letting him finish cleaning would send him into extreme fits of rage.