He would always tell Greg how much he loved them and would ask to wear them anytime.

Greg Heffley had no idea how he ended up at Fregley’s house for a sleepover. It was perhaps the most unexpected turn of his weekend. Fregley, with his quirkiness and bizarre habits, wasn't exactly Greg’s go-to choice for a pal, but circumstances had a funny way of putting people together. The sleepover was a whirlwind of awkward games, strange snacks, and Fregley’s peculiar sense of humor. By the time they made it to bed, Greg was more than ready to call it a night and get back to normalcy. The next morning, however, normalcy seemed like a distant dream. Greg woke up feeling a bit disoriented. He rubbed his eyes and realized something felt... odd. He looked down and almost screamed. He was wearing underwear that definitely was not his. These had colorful cartoon characters splattered all over them, the kind of designs he remembered Fregley showing off proudly at school. "No, no, no!" Greg whispered to himself. How did this happen? Just then, Fregley burst into the room, beaming with excitement. "Guess what, Greg? I’m wearing your undies!" Greg sighed deeply, trying to stay calm. "Fregley, why are you wearing my underwear?" Fregley clapped his hands with a level of enthusiasm only he could muster. "I wanted to see what it felt like to be you for a day! Plus, these are super-duper comfortable!” He did a little spin, showing off the plain white undies that clearly belonged to Greg. Greg could feel his face turning red. "Okay, we need to swap back. Like, right now." "But Greg, what's the rush? Can't I enjoy being cool for a little longer?" Fregley’s eyes were wide with anticipation. Greg took a deep breath. "Fregley, normal people don't swap underwear. It's just... it's not done!" Fregley looked genuinely disappointed, but he agreed. "Fine, but you have to admit, it was kinda fun!” They quickly swapped back their underwear, and Greg felt an immediate sense of relief. Before long, Greg gathered his things, ready to leave. “Thanks for the sleepover, Fregley,” he said, managing a small smile despite the previous discomfort. Fregley waved enthusiastically as Greg walked away. “Anytime, Greg! We should totally do this again soon!” Greg chuckled nervously at the thought. As he walked home, he couldn’t help but think how bizarre the entire experience had been. He made a mental note to reconsider any future sleepover invitations — especially if they came from Fregley. But as odd as it was, Greg couldn't deny that it was a story worth telling. After all, not everyone could say they’d experienced a day in Fregley's (much nerdier) undies.

Title: The Unfortunate Underwear Swap Once upon a time in Plainville, two unintended accomplices named Greg Heffley and Fregley end up in a hilarious mix-up at a sleepover like no other. Greg, the seemingly everyday middle-school kid known for being stuck in some rather unfortunate situations, had reluctantly agreed for a sleepover at Fregley's house. Fregley, famously known as the nerdy kid living next door, was overjoyed at having Greg over. After a long, tiring night filled with Fregley's peculiar 'fun' activities, including showing off his bizarre insect collection and offering Greg a taste of his unusual dessert recipes, both boys finally retired for the night. Falling asleep was hardly a walk in the park for Greg, whose overactive mind overlapped his exhaustion with thoughts on how he'd ended up in such a perplexing situation. Upon waking up, Greg felt strange and uncomfortable. As though something wasn't right. To his horror, he found himself stuck in an embarrassing predicament - he was wearing Fregley's nerdy underwear! He flinched at the sudden realization that he was in Fregley's trademark tighty-whities, adorned with oddly adorable smiling bacterium design. Greg immediately began to scan the room for his undies when he spotted Fregley, ecstatically jumping around in Greg's cool boxer-briefs, which had a distinctive skull design. It was quite evident that Fregley was giddy with joy, as though he just won the lottery. Fregley giggled, "These are so comfortable, Greg! I feel cool! Like you!" and started parading around Greg as though he was in a fashion show, showing off the underwear as if it were a badge of honor. Greg couldn’t help but groan in exasperation, half embarrassed and half amused, wondering if the ground could just swallow him up right there and then. It was later they found out that their bags got swapped in their tired daze, leading to the hilarious, awkward underwear swap. Needless to say, Greg made a hasty exit, vowing to double-check his bag for any snafus in the future. And while it was an embarrassing situation for Greg, Fregley couldn't be happier. He felt special, wearing the underwear of his friend, the popular Greg Heffley. He bounced happily around his room, cherishing the moment and the feeling of being 'cool' for once. Little did they know, that this underwear swap would become a legendary tale in their friendship, one to be looked back upon with laughter (and a lot of blushes on Greg's side). Their story goes to show that even the most peculiar situations can bloom friendship in the most unexpected ways. In the end, what mattered was not the undies they wore, but the bond they shared; one which stemmed from a rather quirky underwear mix-up!