So how does this work then ?
If you're on a tube, bus , train, cinema etc and you are sharing an armrest with a stranger who has right of way ?
Happily resting my arm on one such ingeniously called armrest this morning when blokey sits next to me and tries to muscle in on my space. Now being there first surely I have claimed the space as my own and he needs to tuck his elbows in and just deal with this. Instead he choose to try and manoeuvre a compromise. This lady does not compromise with strangers