You sir in your seat on an airplane next to a short, but round woman. She’s respectful of your space & even gives up the arm rest.
But, as soon as the wheels go up, a neck rest comes out, her seat goes back and she seems to melt. Fully relaxed, her arm starts creeping over the arm rest & her being slowly oozes into your personal space. Not malicious or unthinking, just relaxed. Then the food cart comes by with Biscoff & she’s awake.
The arm rest is yours again.