Room cleanliness
Hello. It has been almost a year since my friend and I went to Taco Bell with two of his friends. All four of us spent the rest of the day in his house. When his friends left, I noticed there was a booger on the wall behind his door and accused him of wiping it there.
He maintains that it was not his but one of his friends who'd done it. I told him he should clean it up anyway since it is his room. Either that, or make that other boy clean it.
He has done neither, a year later. Is this normal? What is wrong with him? How long would you let someone else's booger stay on your wall?