Actually no, I don't think that. I was taught that everyone gets 1 armrest and that one is to be shared. That could be with either window or aisle passenger depending on side of plane. They are meant to be seat dividers and hold control for seat recline. In Europe the understanding is periodic use. with a smile from outer passenger as a sign of thanks for temporary use. Hogging is frowned upon. Also, please keep your feet under the seat in front of you .