"When I lived in the Middle East, showing the bottom of your feet (like when your legs are crossed) was offensive," said Permexpat. "Saw expats do it all the time, though."
"Which ties into how throwing your shoes at someone is such an insult in the Middle East," Redditor frachris87 explained. "The foot is the 'lowest' part of your body, and you're throwing something that spends most of its time touching your feet."
According to The Telegraph, showing the sole of your shoe and hitting someone with a shoe are both considered insults in Arab culture, which is why a man named Muntadar al-Zeidi decided to throw his shoe at George W. Bush. A mosaic of the former President's face was even constructed on the floor of a Baghdad hotel so that visitors could insult him just by walking.