Handholding is also disgusting. You wipe your shit with your right and you jerk off with your left. Hands constantly filthy no mater how much you wash them. Everything you touch through out the day collecting. to prevent such biohazards everything you touch is made of microbefobic materials except your own body. Handshakes are quick and simple. Handholding? No fuck off. You are basically rubbing your dirty hands surfaces together causing friction allowing microbes to thrive and feed off of the salty sweat your both generate from having your hand held.