He was watching a tape of classic Trek with his 3.5 year old daughter. As characters came on the screen, he asked her who they were. "Who's that?" "Captain Kirk." "Who's the blue guy?" "Mr. Spock." You know, that sort of thing.
This being a classic Trek, and Kirk being Kirk, the inevitable happened during the episode.
"Daddy, why is he (Kirk) kissing her?"
"Because he loves her."
"But I thought he was in love with blue guy!"
Our friend says he immediately thought of me. And, "Maybe it's something that women can innately perceive." However, as far as I know, he didn't ask his wife about that.