Thin Skin, Thick Head
Tonight, I discovered blood smeared on the big toe of my right foot. After a quick check to see where it came from, I discovered a newly scabbed wound on my left foot near the ankle. I can only assume that I had scratched an itch on my left foot with my right toe and somehow caused this wound.
In any event, being oblivious and easily lacerated doesn't seem like a good combination, evolutionarily. Swipe left, girls, swipe left.