(I write romance novels, and I’m stuck on a particular bit of banter. My husband walks past my office while I’m staring off into space.)

Me: “Hey, what do people turn the lights down for, other than romantic stuff? I need something funny for the banter in this scene, and I’m drawing a blank.”

Husband: “Transporting nitroglycerin?”

(Exhibit A for the case of “why my husband and I will probably never co-write a book.”)