Walter back to himself

"We are the Perverts League of America, and for a start you can turn back into yourself!" I said while Jacob handed 'Valerie' the device.

"Appreciated!" the apparent Valerie said, pressed a few buttons on its screen and presto!
Valerie was no more. Instead, Walter the inventor appeared in just his underwear.

"You two guys got me good!" he said in annoyance.
"Yeah, by the proverbial balls!" I chuckled.
"Haha! But I invented it only because the invisibility field did not work out... to go places, you know? What do you want now?"
"Well, I got something very particular idea in mind!" I said and continued...