And yeah, I forgot to add that we are virtually surrounded by social constructs: Mountains don't exist and are socially constructed, because there is no sharp difference between lowlands and hills. Old people don't exist as well, because there is no abrubt change in the speed of aging. And, of course, colours are entirely fictional and socially constructed, because black colour slowly changes into shades of grey and subsequently into white. Welcome in Wobble's happy new world!