Beauty is only skin colors.

When it dries up and the skin becomes rough and changes due to the touch of another skin.

Humans try to erase his old touch by putting as much color on his skin as possible.

Yes, they victory by covering the touches skins, but he cannot erase it from the mind. 

He forgets the Skin contacts feelings. When he tries to hard more and keep distance the past incidents.

Then they keeps his dignity high and can forget the experience of skin contact then he feels purity.