Is it normal that i can't stop rolling things?

i am always rolling objects. if i have a piece of paper, i'll start rolling the edges. sometimes the whole paper, if i don't need it. i mean, it could be anything like end of a t-shirt or the sleeves when my girlfriend has it on. i don't remember not ever doing it. As a child i used to roll everything. it's such a strange thing because half the time i don't notice. i roll money all the time. if i have a dollar or any cash really. i roll the end and just keep rolling it.

why can't i stop rolling things? it's not every second of the day but i have done that, every day since i can remember.