Why do cats tuck their front legs underneath themselves while resting?
This appears to indicate they are comfortable, relaxed, and not in a situation that would require them to move quickly.
Why do some humans tuck one leg underneath themselves when they sit in a chair?
Do more short people do this than tall people?
If your feet don’t touch the floor when you sit all the way back in your chair, perhaps one leg tucked under is more comfortable.
Do you ever sit with one leg tucked under?
See imagesbyvandyne on etsy.com for more photos.