[thinking for a while] i think this may actually cover everything i can think of that i've seen
feet
Dude destroyed their argument with a single word.
The part of your brain that handles sensory input on your feet (which has a surprisingly dense amount of nerve endings) is adjacent to the one which handles your genitals. Foot fetish is common because stimulation in one can bleed over into the adjacent sector, stimulates THAT, and then your brain reinforces the connection because we're pattern-sensing machines.
So you can add 'literally wired sloppily' to the list, though as far as I know that's the only case of it being literal brain wiring.






















