There was an exhibition of contemporary art at the local Art Gallery. One of the paintings was of 3 naked men standing beside each other. They were absolutely black from head to toe, except for the one standing in the middle who had a white penis.

The exhibition had only been running for a week and there was this woman who had been in the gallery every day, standing staring at this one painting from the time the gallery opened till it closed in the afternoon. Eventually, curiosity got the better of the curator at the gallery and he approached the woman and said:

excuse me madam, I've noticed you have been in here for a week, just staring at this one painting all day. Is there something I can help you with?

Well she said, i'm very puzzled. I mean, here we have 3 Negro men standing next to each other, and the Negro man in the middle has a white penis. What is the meaning of the painting?

The curator replies: Well madam, it's like this. These are not 3 Negro men, they are 3 Welsh Coalminers and one of them has gone home for lunch.