Einstein had an affair with Marilyn Monroe?

While Einstein was known to have had extramarital affairs, Marilyn Monroe was not one of them.

Another popular urban legend about Einstein that has no basis in reality is that he sat next to Marilyn Monroe once at a dinner and she told him that she wanted to have a child with Einstein -- with her looks and his brain, it would have been the perfect child.

Einstein is said to have responded: "Ah, but what if it had my looks and your brain?"

This is clearly untrue first of all because the two never met, and second because the same story is often told of George Bernard Shaw and Isadora Duncan.