Hey so Parkthur. I'm sorry I can't keep my hands away from age regression, I love when things randomly turn ultra platonic and it's just one person dealing with the other's issues and the other gets to just be a kid who's fussed over.
Parker buys Arthur some candy on his way home once. Comes in and tosses him the bag and Arthur ends up crying so bad he nearly throws up. It just feels so domestic and smells like childhood, when a parent comes home from work and gives you a treat, and Arthur desperately wants to be in that situation again and oh he's chocking on his tears.
He just wants to be small again and to have smart adults tell him what his feelings mean and why everything is the way that it is. He wants to be someone's responsibility and to have no agency at all.
Oh but he'd never say that to Parker.
He'd just sniff and snuggle into Parker's coat.
Parker has no idea what's going on initially. But he catches on. He tries speaking to Arthur in a parental manner during one of his outbursts and it does wonders.
Parker plays into it and just lets Arthur deal with his issues in that manner. He knows when Arthur is having an episode just by the look in his eyes and knows how to behave.

















