I love how a famous forefather ( turned 3:16 experimenter and muser on metaphysics, etc ) suddenly throws in how he wanted to role play cheating in a hotel during the course of research in Oslo, and that was his wife's expectation if he was going to squeeze composing another book into their marriage.

It was so nonchalant it was just thrown in as if he was describing the napkin with the theory on it:

https://youtu.be/mPn2AdMH7UQ?t=5m31s

"Because we liked to have an affair in the hotel room."

"So that was the plan."