Any reminder of Red Dead Redemption 2’s temperature sensitive horse testicles brings a smile to my face. In truth, I can’t say I’ve ever zoomed in close enough to properly take in the spectacle of Arthur Morgan’s mount having its nuts dynamically expand and contract based on whether he’s riding through snowy mountains or across baking plains, but I do always get a kick out of knowing such a thing’s happening as I play. To this point, the horse balls…