Random as far as I know.

[ Eliot sits in a chair, sinking into it. He takes a large sip himself, more like a drink or a gulp than a sip. ]

Don't get too comfortable in it. Margo told me she used to be a Dominant and now she's part of the collar gang.

[ Eliot taps the plain black collar around his neck. ]

I can't even take it off at home. It's in my contract.