2. So much dancing
The Doctor Who practice of using “dancing” as a metaphor for intercourse begins in 2005 two-parter “The Empty Child/The Doctor Dances”, with these comments between the Ninth Doctor and Rose:
Ninth Doctor: “I’ve been around a bit. I think you can assume at some point I’ve ‘danced’.”
Later, following Rose’s surprise when Captain Jack Harkness starts chatting up a man, he adds: “Relax, he’s a fifty-first century guy. He’s just a bit more flexible when it comes to ‘dancing’.”
In the next series (in an episode also penned by Steven Moffat), the Tenth Doctor is invited to dance by Sophia Myles’ Madame du Pompadour, who notes that “There comes a time when every lonely little boy must learn to dance.”
Considering the bed that also appears in the scene and the Doctor’s cheery demeanour afterwards, we might assume the metaphor has continued.
Still, if this theory is correct, we’re not quite sure what to make of the Doctor’s “drunk giraffe” dance moves at Amy’s wedding a few series later.
Actually, let’s try not to think too deeply about that, eh?