I'm reminded of an international flight I had back from Asia.
The guy behind me took his shoes off and his feet smelled of roadkill. He then proceeded to wedge one of them between my seat and the airplane wall (we were both in windows seats). Spoke no English and ignored my repeated signals of pointing to his foot and holding my nose.
After realizing he just didn't care, I ordered a glass of ice-water. Moments later it spilled near the armrest, right on his stinking sock foot. Oops. The flight attendant brought him some complimentary socks. Problem solved.