I have a theory about tying shoelaces. I tie mine in the "correct" way which doesn't reposition the loops vertically. Never thought about it until that viral TED talk. My son, however, does the opposite. Since I'm the one that taught him how to tie his shoes, my theory is that he watched me make knots, from the opposite side, and thus internalized making the same knot, but in reverse.

If my theory is true, then every other generation ties their knots in reverse...