Suggest he show you himself.

Your experiences in haggling over prices and cutting hairs on deals makes you naturally suspicious, and this fellow seems less than trustworthy, so you casually suggest he go first. “Certainly,” the salesman says smoothly, his eyes betraying what might be a hint of concern. “Perhaps you could make a suggestion of the cow.”

You look about the stalls and spot a likely candidate, an attractive but vacuous eyed brunette with a row of six milk engorged breasts. Her pink nipples are quite large and look ready for milking. You grin at the thought of this salesman occupying her body.

“Perhaps that one,” you point.

“A fine choice sir!” the smile on the salesmans face seems to be a little ****. “Perhaps you could bring her from her stall whilst I prepare the machine.”

You approach the docile creature. She hardly seems to be human, a fact reinforced by her hoof hands, horns and cow ears. You touch her face and she licks your hand as though looking for a treat. You lead her into the next stall, and you have to stair at the way her rows of breasts sway. The salesman connects a short chain to her collar and places a strange helm on her head, securing it in place. Wires lead from up then come down again to a similar helmet which he attaches to himself.

“You’ll have to help me,” he says, licking his lips nervously as he arranges the wires carefully and sits in the transfer chair. There are straps on the arms and legs. “These are… um. To protect the user. You don’t want the cow girl to hurt your body when she inhabits it.” You nod as you reach down and pull one strap tight on his arm and then the other. Suddenly there is a pop and the lights go off. “Damn, we’ve lost the power. I’ll have to show you another time. Could you release me?”