Straightjacket etc.

You imagine Stan in a thick leather straightjacket, one that they use in asylums. You then add a different kind of chastity device. This is more of a cuff attatched aroudn the base of the balls and dick, with a tight leather bag over the rest. He gets padded leather ankle cuffs with metal rings for attatching different things.

Finaly you imagine him with a special medical-style muzzle that you'd spotted browsing the Church of Sinvention webpage recently. You strap it on as tight as it can go and imagine him being almost mad with lust.