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Jack's writhing on the bed, desperate to escape. "Stop! Please!"
The Doctor's grin is gleeful. "Think I'm girly, eh? Who's squealing an' wriggling prettily now?" His fingers dig into Jack's sides, dance over his ribs, and torture his stomach.
"Sorry! Didn't know you're… only supposed to try that… on women!"
The Doctor chuckles. "Shoulda read the footnote, lad. Teach you to poke around in my private library." He wriggles his fingers in Jack's armpits.
Erupting into a fit of giggles, Jack rues the day he swiped the Doctor's copy of Hot Tricks: The Encyclopaedia of Pleasuring Every Species. Volume T.