M.C. Escher's Drawing Hands, lithograph, 1948
Solar-powered self-mowing lawnmowers are the most mind-numbing thing there is, when you think about it.
Second in line is the fact that we have had to build structures to keep the Alaskan gas pipeline from sinking into the earth due to global warming.
Lastly, 'synthetic musk' is the thing in dryer sheets that makes you want to make love to dryer sheets. (Also called fabric softener.)