I've never heard lady bits referred to as their sparkle. I think it's a nice name.

(Badger Catapult Cabaret, Tue 12 Feb 2013, 21:41, Reply)

I don't think anyone wants her sparkle

( smearballs double bag it!, Tue 12 Feb 2013, 21:58, Reply)

Reminded me of an amusing strip I read last week:
tinyurl.com/aq8kmv6
(loci, Tue 12 Feb 2013, 23:20, Reply)