Watching paint dry

Another weekend and we're painting again. When we finished last year's decorating my husband said that he would throw away the old paint brushes and buy some more. Well he bought some new brushes but also kept the old ones. So I expect you can guess what has happened - he is using the new brushes and I am using the old brushes. He is painting the doors and I am painting the door frames and the skirting board. We did have two cans of paint so we each had a can. Now we are down to one can between the two of us we are having to take it in turns to paint.