The 36 Questions study is a 1997 psychology experiment that used escalating self-disclosure questions to generate feelings of closeness between strangers in a lab, not a formula proven to make two people fall in love.
A date night question is a conversation starter designed to shift a couple out of autopilot small talk and into an actual exchange, on a night set aside specifically for that.
The ideal question frequency for couples is roughly once a day or every few days, asked in small doses, rather than occasional long sessions that try to cover everything at once.
A married couples question is a question asked specifically to update what you assume you already know about your partner, not to fill conversational space or pass time.
A love map is the internal, continuously updated picture each partner holds of the other's inner world: their stresses, hopes, fears, and the small daily details of their life.