I'm not sure when I decided on the word 'Hoon' - I think I just thought it sounded a ridiculous word as the surname of the utterly and ridiculously incompetent MP of the same name. I suppose if I needed another one now it'd be a 'Grayling'!
I do love though how
Doctor Who manage to come up with simple yet original one or two-syllable names for the aliens. You'd think all such possible short words would be used up by now, kind of like three-letter domain names!
I think something
@llewelyn said about the Hoon is right - the bigger one looks like she's chasing it; the smaller one looks like it's trailing just off her shoulder, so it looks more like a pet or a familiar.
Thinking about it, the whole pin-up girls on bombs thing for bomber squadrons is just an update of witches flying on broomsticks. (I did like the gag in
Hocus Pocus, where there's only one broom so the other two witches fly away on a mop and a Hoover). Though the whole broomstick thing isn't entirely innocuous...
Though it does bring us back to
Kiki's Delivery Service...