Wow, there's a weird for it? Manspreading?
When I have to pick a place next to someone on the bus I may pick just a passenger doing that. And I don't shy away from physical contact.
My leg touching theirs, And me being aware of that touch and not unnerved. Not pushing, just bringing my attention there. And slowly the leg of the other will withdraw, with my leg following, till I have my whole seat. If I'm cold, I'll even enjoy the warmth, stealing it away from them.
Works quickest when the other passenger is a youger man. Especially when they have a big macho attitude.
It's a secret plessure of mine. And I heard someone else telling about doing just the same.
It's fun.