I'm agreeing that readers should have an idea what they're going to find.

Hypothetical: What if het UST is in a story? Or something romantic or iffy like... *thinks*

Okay, the Doctor is with Jack, but he's flashing back to the last person he was with and it was Rose, and he thinks about how he loves her too and misses her.

"Ew!" or "That's fine. It's not graphic hexsexing!"

Should there be some mention of this character who's not actually present in the story itself, in your view?