Is it normal i subconsciously rip any paper i have in hand
I've noticed that I always do it.
If I have a plastic water bottle, I'll rip the paper thats wrapped around it to shreds. If I've got some tissue paper with me, I'll rip it to shreds.
If I'm wearing a hoodie and I've got some paper or stuff in my pockets, I'll keep my hands in my pockets while ripping them up.
Even if it's something relatively important like homework, I may end up ripping the corners off.