I think in non-poly couples, having a mostly Builder or Entertaining relationship is a sign that one or both parties is having an affair.
This is because all the happy couples I know seem to have ~50:50 ratio of building/entertaining. And the unhappy couples have ~0:0. And I only know non-poly couples.
Here’s my lightning talk: I collect advice for learning how to play chess. The largest collection I’ve found is a slim book called “Rapid Chess Improvement” by Michael de la Maza.
Please send me the rarest advice you’ve heard of for improving one’s chess ability.