I’ve seen it both ways. I downloaded the scripts a few years ago, and they used ‘set’. On the DVD it says ‘sex’. Listening to Vyvyan, it could be ‘sets’ or ‘sex’.
Harry Potter and the Pussycats
Harry Potter and the Missing Chums
Harry Potter and the Disappointed Readers
Harry Potter and the Staff of Olorin
Harry Potter Gets Jailed As A Terrorist
Harry Potter, M.P.
Harry Potter and the Suspenders of Doom
The Da Mentor Code
To conclude our little hijack party, I just checked it out again, you’re right, it could be either, though the context made me think it was supposed to be ‘sex’, of course. Maybe the scripts were censored for some reason? But that doesn’t make any sense, this is the same episode where Alexei makes the joke about British businessmen slamming each other’s dicks in the door, just for one…
Now for topic: **Harry Potter and the Friends of Dorothy **
Harry Potter on Zombie Island
Harry Potter and the Witch’s Ghost
Harry Potter and the Ghoul School
Harry Potter and His Electric Rifle
Harry Potter and His Wizard Camera
Okay, sorry, but just one more cheap shot, I promise:
Piers Anthony - The Color of Harry Potter’s Panties
Harry Potter vs. Godzilla
Harry Potter and the Fake 7th Book Because If You Think I’m Giving Up on This Gravy Train, You’re a Wanker
Harry Potter and the Electric Boogaloo
Harry Potter and the Slashfic Lawsuit
Harry Potter and his Electric Parseltongue
Um, if she’s wiping her arse with £100 notes, that doesn’t matter too much, because they’re fake. 
The largest UK currency denomination is the £50 note.
Harry Potter and His New Friend, Jesus --to bring all the fundies to the table.
Or maybe his new friend should be Lazarus…
Harry Potter and Davy and Goliath and Jesus
Followed quickly by
Harry Potter and Davy and the Bestiality Bust
and
Harry Potter and Davy and Goliath and the Exorcism
Harry Potter: The Next Generation
No, that’s the title of the 8th book.
Sorry, I got nothin’ else to add to the thread 