When I flew back from London two weeks ago, I sat next to this woman who was like 5'3" 130 and she insisted on using all of both arm rests, I was heated. I let her do it for about 3 hours before I muscled her out and took my rightful half. I also later gave her my caramel brownie from our dinner. I did all of this without making eye contact or taking my ear buds out.