Something I always wondered: Why do women use nail polish? I understand the purpose of lipstick. Women who paint their lips in a deeper shade of red simulate sexual excitement. Men find that attractive. But the color of the finger- and toenails does not change with sexual excitement, so why simulate that? The majority of men also don't have a fetish for women with blood on their toes and fingertips, so I don't think it's supposed to represent blood. The most sensible argument I have heard so far is that nail polish hardens the nails. But if that was the only or even the main reason for its use, there would be no reason to use unnatural colors. I have also tried to find the historical/cultural roots of this custom, but I couldn't find anything. Maybe I looked in the wrong places. Can someone please enlighten me?