If you're leaning a little to the left, you're also probably going to be a little on the low side when it comes to guesstimating all sorts of approximations. Whether that's how many people live in a certain city, how much alcohol is in a particular bottle of booze, how many top-10 hits a band has released or how tall a specific building is -- if you're tilted slightly to the left, that number is more likely to be less than what it really should be [source: Eerland].
Participants in a study at Erasumus University Rotterdam didn't even know they were tilted during the experiment. But with a tad tip to the right, the numbers were higher, and with a little lean to the left the opposite was true. Interestingly, the difference between when people were leaning right versus standing upright wasn't significant – perhaps because all the participants were right-handed. We need more science, stat!