Me literally every time some jerk on the train tries to spread his (and it is always ‘his’) legs across 3 seats.
Yo, you can pack a bag and take this train all the way to the Men’s Rights headquarters. I’m sick of some dinky high school boy trying to nudge me out of the way so he can take up both arm rests.
I’ve had a lot of men stop dead in the sidewalk and dance awkwardly out of the way at the last minute, giving me bewildered glances because I moved exactly halfway over when walking towards them and they expected me to flatten myself to the wall. I’ve watched uncomfortable knee-flinches when my legs obstinately refuse to be primly squeezed together to allow him the maximum possible spread on public transportation. I’ve received uncertain side-eyes on the plane because no, actually, I am using the armrest on this side, you can have the one on the aisle/window.
It’s always the exact same expression, too; this startled, confused uncertainty, like they’ve never before considered the fact that I might demand the space courtesy grants as my due - followed by an uncomfortable yielding when they face the fact that there’s nothing they can say without being an overt jackass.
I shoulder-check a lot more dudes than I used to, consciously not getting out of the way. It’s great.