she probably sleeps with one cuddled up like a stuffed animal
or perhaps she often eats turnips in bed, so the smell has absorbed into the sheets --- Sanity's really just a one trick pony, you just get one trick: rational thought. But when you're good and crazy, oh baby! The skies the limit! - The Tick
A lady friend and I once made up a goofy scenario where Rosetta walks in on Mist using turnips on Raguna in disturbing ways, and Rosetta has to be all "No, bad Mist, that is not how you use turnips!"
... I think she said she'd write a fanfic about it. She never did.
I was imagining it being like this, except on herself. I've heard of women using phallic-shaped fruits and vegetables to masturbate in place of commercial devices, so this seems reasonable enough to me. --- http://i.imgur.com/kQDKi.png