Anyway, there seems to have been a healthy response so far. My favourite is:
Catherine Deneuve
Makes many men perve;
When they see her on screen,
Their thoughts turn obscene.
I've had a totally shitty day and my brain's shrunk to the size of a gnat's testicle right now, otherwise I'd offer you a Clerihew of my own, but if anyone else wants to have a go...