TV
So Lister what are you telling us? You're a closet squirrel? Behind closed doors you parade up and down with a strap-on bushy tail, calling yourself Nutkin?
— Rimmer • Red Dwarf

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker mockingly exaggerates a supposed secret, picturing Lister in private wearing a bushy strap-on tail and calling himself Nutkin. The rapid-fire questions ridicule the idea with theatrical disbelief, treating the imagined squirrel persona as both absurd and faintly scandalous.
Context reviewed