Chris’ vacation was a resounding success. A week in the sun with his old college mates, drinking and reminiscing about the “good old days”- all of these things proved to be exactly what the doctor ordered. In fact, a few friends even commented upon how little Chris had changed in the years that had transpired since their academic days. Many of his old chums had not been so lucky- and Chris found himself ribbing them for getting “dad bods” before they had even become fathers. Still, it was all in jest, and no one took the light jabs to heart.
When the week came to a close, they all said their goodbyes and performed that all too familiar ritual of swearing they would see each other more often- perhaps this sort of trip could even become a yearly occurrence? Chris doubted that, but he played along. 
When his plane touched down, Leslie was naturally one of the first people he messaged. 
Chris: Back in town! Thanks again for that little favor. Want me to come over?
Leslie: No problem! Yeah, come on over in the afternoon. I’m just wrapping up some work product. Pick up some beers!
Chris though the message was a bit odd, coming from Leslie. While it wasn’t like Leslie was against alcohol, she had never been much of a beer-drinker. In any event, he stopped by his place after leaving the airport, swung by his house to freshen up and change into something comfortable, and then grabbed some beers before heading to Leslie’s.
“Door’s open!” Chris heard from within Leslie’s house when he knocked on the door. Leslie was more or less where he expected her: sitting at her desk and typing away. She finished an entry and pumped her fist in the air, setting her generous arm flab to wobbling. 
“Finally,” she cheered, then spun around and rocked herself out of her computer chair, “Ya got the beer?” 
Chris dutifully handed her a beer, which she cracked and took a sip of. 
“When did you become a beer-drinker?” he asked curiously before taking a seat.
“Ya know,” she said, tapping her chin with a finger, “I think it really started when you gave me some of your chub. Maybe transferring mass does more than we thought. In fact, check this out-”
Leslie stood up. Chris looked her up and down, expecting something to happen.
“Uh- what?”
“Stand up, you’ll see.”
Chris complied with her order, standing up in front of her. Still, he couldn’t determine what in the world Leslie was trying to demonstrate. 
“Uh?”
“I’m taller, Chris!” she said, walking up to him. Chris took a second to confirm, realizing she was telling the truth. While he had never been significantly taller than her, now they were almost eye-to-eye. 
“Holy shit!” Chris managed when he realized she was telling the truth. So the transfer of mass had made her like beer and an inch taller… 
“It’s almost like you take on some of the traits of the person you take mass from,” she said, returning to her seat. I hadn’t seen anything about that in my book, so it’s good to know.”
“Well,” said Chris smugly, “I guess you should THANK me at this point.”
Leslie laughed, “Yeah, sure- growing an inch is pretty nice, but lugging around those 25 pounds was no fun. Speaking of which- it’s time for you to take this back, bud.”
Chris relented, “I know, I know… Let me just get one last look at skinny me before we go and ruin it again.”
Chris turned to the full-length mirror Leslie had in her hallway. He let out a sigh, raising his shirt and getting a good look at his well-defined abs. 
“We don’t have all day, Narcissus!” 
“Fine, fine.”
Chris walked over to Leslie and pressed a finger into her rune. Leslie did the same in return. 
“I’d like to transfer twenty-five pounds,” Leslie said with a smile.
“Oh I bet you would.”
Leslie smirked. The tingling sensation returned, coursing once more through Chris’ entire frame. Whereas he had felt a sort of shrinking sensation before, with his clothes becoming loose on his body- now he felt quite the opposite. His roomy sweats became decidedly less so, and his midsection pressed into his shirt. Ugh… back to being kind of chubby-
Leslie breathed a sigh of relief. “Oof, that feels much better.”
“Speak for yourself,” Chris said, feeling an unfamiliar lethargy creep over him, “That felt weird-”
	“Well what do you exp-”
	Leslie stopped speaking when she spoke to Chris and frowned. Her eyes scanned his body up and down, then she walked around him as if she were inspecting him. When she was behind his back, she let out a laugh.
	“What?” 
	“Uh… you might want to get a look at yourself in the mirror again, Chris…”
	“Wh-why?”
	Chris obliged and turned to look in the mirror. At first, he was unsure what Leslie was talking about. He had gained the weight back, sure. He was back to his somewhat out-of-shape self, but what was there to laugh abo-
	Oh. What Leslie had chuckled about almost immediately clicked. It appeared that Chris had not taken back HIS original twenty-five pounds, but rather just twenty-five pounds from Leslie’s body… and they had settled more or less as they did on Leslie’s body as well. Whereas Chris had been rocking a bit of a gut and some otherwise evenly distributed fat before, this new fat- Leslie’s fat- had largely settled below the belt-line. The result was obvious: Chris was sporting a much bigger butt than he had been used to. While it was hardly enormous or comical, it was a startling difference. Pressing a hand into his rear, which had rounded-out considerably, Chris was shocked to feel how big and soft it felt. His thighs had followed suit, thickening somewhat to support his larger backside. His midsection was puffier than it had been a few minutes ago, but it was certainly thinner than it had been when he was lugging about fat in its usual configuration.
“Got a little junk in the trunk now, Chris,” she said, “How does it feel?”
“What the hell- why is the fat… why am I?”
“I think I know,” Leslie reasoned, “I didn’t send back your fat… or at least, not EXCLUSIVELY your old fat. You see, since there’s sort of a bigger ‘pool’ to draw from, so it just sent ANY twenty-five pounds…”
Chris continued to examine himself in the mirror. He hardly looked ridiculous, but this was incredibly weird for him nonetheless. 
“I mean- it’s not all bad! Girls like guys with a bit of a butt! And visceral fat is the least healthy, so maybe this is a blessing in disguise,” Leslie said, trying to comfort her newly “cheeked up” friend.
“Forgive me if I have trouble seeing this as a blessing,” Chris said, “Take the fat back! I want MY fat.”
“I don’t think it works that way,” Leslie said, “But really- it’s barely even noticeable!”
Chris sighed once more, defeated. His stomach produced a low rumble. 
“Whatever… ya got anything to eat? All I’ve had today were some crappy pretzels on the plane.”
Leslie hopped (well, waddled) into action at the mention of food. Perhaps a snack would help Chris get over his somewhat comical new fat distribution. Leslie made her way to her fridge and inspected the contents within. Chris, in turn, dropped his newly padded rear onto Leslie’s couch, noting that at least this bubble butt was comfortable to sit on.
“Uhh… bad news, Chris,” Leslie called from her kitchen, “All I’ve really got are some Twinkies and some Chunky Monkey Ice Cream… not your usual savory fare.”
Chris held a hand to his soft, but not protuberant tummy. Honestly, some sweets didn’t sound that bad right now at all. Was that Leslie’s fat talking? He didn’t like what that might suggest, but was too hungry to fight back right now.
“Fuck it, bring ‘em both- I’m starving.”