When we come out of the arena, the crossties are right across the door. My horse automatically stops, waits for me to pick his feet and then does a 180 and backs into the crossties, occasionally regardless of there being a horse already in there or not!!! But it's nice when the crossties are empty lol.
Not quite as unintentional, but I always give my horse a head scratch with a rubber mitt after I take his bridle off. As a result he waits patiently to be scratched and doesn't scratch his head or bridle on anything until the bit is out of his mouth.
They say money doesn't buy happiness -- well happiness doesn't buy horses!