It's true that as people get older, their sexual appetite tends to decline, which might lead to adultery taking place within the confines of an otherwise happy marriage. This mathematician decided that he couldn't get what he wanted from his wife anymore, so he went looking for someone one-third his age. Wanting to be honest about what he was up to with his wife, he wrote her a letter. The thing is, he never imagined what her response to his letter would be!
