Remember that epic dick joke from the season finale of HBO's Silicon Valley? Well, Stanford researchers have run the numbers. And if you'll pardon the pun, it stands up. Says math!
Below is the full explanation of the joke. It's totally mathematically sound, and it includes further explanations and drawings, in case you were chuckling too hard through the long, elaborate joke to catch the diagram of you know, shaft ratios. This is amazing, and somehow educational. [@MikeJudge]