concept: since jim and spock are used to different temperatures in their quarters, when they start living together, they settle on a compromise (not too cold for spock and not too hot for jim) - but they also start a game with betting each other “thermostat points”
one point means the winner can change the temperature by 0.1 degrees
this results in saying things like “i bet you 4 thermostat points i can climb that rock”, or “50 thermostat points say the next peaceful mission will result in a disaster as usual”
Headcannon that Shouji is really good at rock climbing. He has all those arms and hands and he could use his eyes to scope out hand and foot holds.