Would it be just the character that is bound to the rack that is dressed up, or would the one conducting the experiments also be dressed up? A French maid (either female or crossdressed male) could be operating a milking machine on a male subject, making her (him) a "milk maid" :D I can also picture a classic dominatrix outfit here.

What kind of electrodes do you intend to include?

If latex bondage is chosen, I can easily imagine rubber sensory deprivation hoods, complete with blindfold and (cock?) gag as part of it. I think the hood would cover the ears too. Gas masks would figure in too, and the air supply could be laced with pheromones.