Do physical work, use them in the way they evolved to be used. I have a farm which helps here as well, land and forest give enough opportunity to behave in typi

Do physical work, use them in the way they evolved to be used. I have a farm which helps here as well, land and forest give enough opportunity to behave in typical primate-specific ways. I also build stuff around here, now building another barn. I find the combination of physical and intellectual work complements each other in many ways and thought out many a solution while sitting on the tractor. For the rest I just wash 'm, really...