Says who? Who made that rule? If you got/want paint in your bed, it's just paint in the bed; you change the sheets and do the laundry if you don't want paint in the bed.

I do not know what you are trying to convince your T of? Problems are for solving, not cataloging. Are you asking your T to come over and make you stop doing your hobbies?

I'm still having trouble with who criticized you for getting paint in your bed that you think that is "not normal"/allowed. I write poetry in my bed, I'm sure I have gotten ink on my sheets and I have a wonderful memory of being sick when I was about 7 and in my parents bed and my stepmother bought me a life-sized "model" of a bird, a robin I think, and I spilled the dirty paint thinner, made an ugly gray splotch on the sheets (that may well have never come off). She said, "It was an accident, that can happen; here, hop up and let me change the bed."