I would advise against cleaning brushes with vegetable oil because I don't want -any- in my painting, so I'd have to clean the oil off of my brushes with soap after cleaning them with oil, and that's an extra step.
Actually, when I was young I used to be frustrated by my pristine, boring hands. They had no wrinkes, just smooth skin, and I was into the verristic style so I looked at them and thought "age!" But now they are quite meaty from work and have moles and wrinkles. I have one mole in the middle top of y hand that's raised and dark, and people always put the stamps/ x's over it when I go to clubs. I think that means they think it's ugly.
I was once playing lady macbeth and used it as my "spot."