Toilet paper fetish

I have absolutely no idea why Reagan seems to LOVE toilet paper. She pulls tons off the roll and then carries it with her. She also get really mad if you take it, throw it away or if Carson tries to steal it. I am only writing about it because I know she won't believe me later in life when I tell her about this. It's been going on since the move to her new school. At least the fetish shifted from rocks to toilet paper. Hopefully she won't start eating it. Ick!