Caterpillars. Everyone loves them, so it was safe to say that not many would actively try to squish you. Plus in time you get to become a beautiful butterfly. You agreed to it and were both given the injection, but you were skeptical since yours was slightly a darker shade than Samantha's, so you asked for the same injection as your wife. The scientist looks at you, but you ask for it again and he hands you it with a weird look, but then shrugs it off and exits the room. You quickly stripped yourselves naked and watched each other for any signs of transforming.
You are the first one to show any signs, as you start getting shorter. She then joins you as you both shrink down to about a few inches tall. Both of you then are compelled to lie down and do so facing each other. You watch as your wife's arms merge into her body, as you feel your feet blend together. Eventually the two of you are just 2 flesh tubes with a head. Your wife has her breasts still however. But soon, so do you.
Your torso lifts off of the floor slightly, as a pair of tits balloon out from your chest. Followed by 2 more rows, then another few rows, until from top to the tip of your "tail" you are lined with row after row of breasts. The same happened to your wife. Next, all of your nipples lengthen outwards, lifting you up even further. It is then that something very unexpected happens, you become able to move your nipples at will.
It then clicks for your wife. "Ohhh! Our breasts, must now be our new legs and feet!"
It turns out to be so, so you relax a bit. You are able to move about, albeit slowly. Then a hand picks the two of you up and puts you both inside a jar, which is then taken to a large terrarium. And once the two of you are inside, you see a sign label be attached to the glass.
Female Caterpillars, DO NOT EXPERIMENT ON!
Then it listed your names,
Samantha
Jacklyn (formerly Jacob)
"Oh fuck me, so that must have been why mine was darker..." groans Jacklyn. Samantha just laughs at her husband's misfortune, now stuck as a female for the time being. "Its what you get for trying to insist you knew better than that scientist, my dear... wife" smirks Samantha.