(beginning borrowed from Spooky)
"wait a second Karyn, If I wear all this stuff I'm gonna look like a regular girl, and then people will think I'm a girl, we need a stronger test, something to make sure nobody can mistake me for someone else"
"oh i think I know what you mean, so we should test with using you with a major change but one that people can still tell it's you right?"
"Yes exactly" Jon wouldn't have minded going full-out girl, but what really intrigued him was partial transformations
"I know just what to do Jon." Karyn reached into the box and pulled out a pair of Rocky Mountain jeans and tossed them to Jon. "Put the pantyhose and those jeans on." You'll still definitely look like you, however those jeans should definitely show off the wrong figure for you up close.
"Heh, well it beats having to wear a skirt in public," Jon replied to Karyn. Maybe he could wear one another time, but Jon was happy to start small. This could still be embarressing.
While Jon was distracted momentarily, Karyn pulled another item out of the box and tossed it to him. "One more thing, boxers won't work under hose, so you'll need these."
Jon looked at the garment and saw a lacy black thong. "Hey now, why does it have to be a thong?"
"Don't want you to have a visible panty line now do we? Now stop wasting time and get dressed while I put these rest of these things back in the box."