Jason was about to make a selection, when suddenly he felt Surfjan's dick enter inside of him again, catching him off-guard. "F-Fuck...." The other frat bro said lecherously, "Man, I can't stop getting horny when I see your ass dude."
Jason blushed despite himself, Surfjan was an excellent boyfriend. He still wanted to change that to something else, but as the other bro geared up from round 2 and started pounding him again, Jason's finger slipped, overwhelmed by the ecstasy, unaware he had made a change to something. "Ugggh, fuck..." He panted, his finger accidentally clicking 'submit'.
As it did so, the feeling of Surfjan's dick inside him was gone. For a moment, he wondered if he had made him stop being his boyfriend, until a foul yet familiar smell assaulted his nose and he felt warm mush spreading across his rump. He looked down to see Surfjan's back facing him, squatting down, his fat ass shitting into the opened diaper at around Jason's waist. Jason's eyes widened in disbelief, both at the action and at the fact that it was his boyfriend doing it, a part of him still felt queasy about it, somehow knowing diapers were foreign to him, yet at the same time 'normal' too. He knew this was all being caused by the app. He checked what the sentence had been changed to, reading out 'Surfjan is pooping his boyfriend's diaper.'
When Surfjan was finished, he let out a sigh, rising from his squatting position, a huge mound of shit in the open diaper. "There we go, babe." He chuckled, turning around, "Now everyone's gonna know you're MY boy at the frat." He said, as he gently and carefully taped the soiled diaper around Jason's waist. The frat bro cringed as mush squashed against his rump, the feeling both familiar yet unusual to him, yet somehow he could detect the loving nature of the gesture. His diaper was full of Surfjan's love, proof of how much he cared, his shit was so heavy and filling, stinking up the whole area. It was unmistakable and certain proof that Jason was 'his' for wearing the diaper he had shit in. This, he remembered, seemed to be common practice for couples in this world.
Jason awkwardly rose up too, the diaper filled by his boyfriend squishing beneath him as Surfjan laughed, "The boys at the house are gonna be jealous I bet." Jason chuckled a bit, squishing in his boyfriend's mess, the feeling undeniably pleasant. He looked back at his phone, "Jason is sitting in a diaper soiled by Surfjan." Before he could make a change, Surfjan was already getting into the front seat, "C'mon, let's go show everyone your new dirty diaper." Jason nodded obediently as he joined him, squishing more in his dirty diaper, savoring Surfjan's love.