_Sometimes it’s easy to get wrapped up in the hobbies and interests of your friends and loved ones, as Spirit currently found, being wrapped up in a Diaper as Starlight Glimmer was having some fun with him. He and Fluttershy had been here to hang out, and Spirit Wind wasn’t quite sure how things got this far.  
But now, as Starlight once again manifested her magic into a familiar pendant, it caught Spirit’s eye like a magnet. _
 
He wanted to resist, truly. What Starlight was doing made him feel embarrassed, anxious… to be made to feel so relaxed, knowing he would soon be so vulnerable was… a peculiar expectation to say the least.  
He wanted to resist what she was doing, but it was just so hard to look away. And just maybe part of him didn’t want to. Maybe it was the soothing presence of his marefriend being here that made him feel more comfortable, or maybe it was that a part of him just wanted to give in and experience that relaxed state of being hypnotised.  
The part of him that didn’t want to lose his ability of self-control and be manipulated still fought for a while, but as Starlight spoke calmly to him, he eventually found his body relaxing and going numb as his eyes drifted back and forth with the pendant helplessly. Finally his eyes did grow weary, his eyelids sliding lower and lower, his mind finding it increasingly hard to think… until he finally gave in. His already absent mind incapable of processing any thoughts. He didn’t even remember the exact moment he fell asleep, or rather, fell under Starlight’s spell.
 
Over the next few hours, Spirit’s life was just a distant blur, as he was unable to think about anything other than playing with simple, foalish toys… stacking building blocks, pushing along little cars, colouring with crayons, batting about a mobile he found so fascinating. He just felt so happy and free, wrapped in a comfortable diaper, sucking absently on a pacifier, his eyes dizzy and hypnotised…  
Spirit had been mentally regressed into a foal. All of his responsibilities, his worries and concerns, his anxieties and inhibitions and stress, had all been completely removed from him in exchange of his mind and his adulthood. He was free right now, and happy, acting simply on his basest foalish desires.
 
Fluttershy was more than happy to see her coltfriend relaxing so much. Starlight might be new to this whole thing, something Fluttershy was more experienced at, but she was doing well. Fluttershy was happy to stick around and play with her little colt and help take care of him; feeding him milk from a bottle, playing with him, and of course, giving him a change when he needed it.
 
But soon it was time to go. Spirit’s whole world had been a dreamy blur of absent thought, but all of a sudden it’s as if, with a snap of Starlight’s magic in his ear, his mind just instantly turned back on, like it never left. Suddenly he found himself snapping out of the hypnosis, a wave of dizziness washing over him as the state he was in faded away and he remembered everything.  
He remembered what Starlight was doing to him before he drifted away…
 
Spirit blushed as he looked bashfully upon himself, wondering how long he had been… out. It must have been a few hours at least. Wondering what he had been doing, how embarrassing and silly he must have looked, feeling bashful over the idea of him being in that vulnerable state with no control… and of course, upon feeling his rather thick and warm diaper.
 
But Spirit’s trepidation and embarrassment were swiftly allayed as Fluttershy took his hooves from the side and gave him a quick nuzzle on the snout, smiling warmly and lovingly at him.  
“See?” She spoke softly, “that wasn’t so bad now, was it?”
 
Spirit had to admit, he had fun, and felt pretty nice right now in spite of the butterflies in his tummy. As bashful as he felt right now, he didn’t really mind this at all!
 

 
Hehe this was just a cute idea that popped into my head and I just had to give it a try >w< I haven’t been drawing too much lately and trying to get back into the swing of it, and here I come with a comic XD
 
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This is the Clean version:  
Wet version: https://derpibooru.org/1971054  
Messy version: https://derpibooru.org/1971063