I get oil painting withdrawals. This happens usually when I can't paint for a few days. In these moments I paint something just for myself, like this face. I grab a tube of paint that either I hate or that I have never used. (I have a small case of paints that were given to me.) In this case Manganese Violet was chosen. (PS. I hate purple tubes of paint!) I think it is the challenge of painting with something that I wouldn't normally choose. I should have used more purple paint.