It's quite interesting how much weight humans give to old ideas. Probably a Lindy heuristic. But, man, imagine if I was early to that field and made it so that we had to conceive of all doors as being vaginal (constant testaments to women's obsession with their genitals). Do women like putting things in the trash bin because they have penis envy and want to experience putting a sword in a sheath, so to speak? Why do wives like tidying up? Is it because they like putting things in cubbies, simulating the sex experience?

Wholesale trash thought. Man, even a mildly intelligent teenager has surpassed this level of free-association. But the age of the concept and its Barnum effect explanatory behaviour makes it the home of every mediocre mind. The only risk, I suppose, is that if we end this obvious sign, we remove a clear signal of sophomoric thought.