I don't know but you're right.
I suspect it has something to do with the pointy bits.
That's not the way you play with Lego!
sounds like you have become addicted, be careful after a while you might start dreaming in Danish.
Because it is hard and the little sharp points stick into your foot that is full of nerves
It is a fault of our species,.....we SHOULD be able to interlock,....but we CANNOT,....thus those 6 bumps per LEGO block,....hurt!! Damn genetics!