As much as I can see Peter wearing jewelry, makeup, nail polish, super fancy clothes, I can never picture Juno wearing the same. No matter what he looks like, he’s always scruffy in my head.
Not because that’s necessarily his ideal look, but because he’s just that deep down the rabbit-hole of self-loathing. The guy needs Rita to prod him to shower, let alone shave on a regular basis.
The fact that he likes the idea of fancier duds makes it even worse, because then he starts thinking about how he doesn’t deserve to have nice things. Denying himself is yet another form of self-flagellation.
I’d like to think that starts changing when Peter becomes a regular part of his life. He starts being a little more careful about his appearance, because Peter’s always so put-together and it feels weird being a mess when he’s next to somebody who looks like that. And as Peter builds him up, he starts taking a little more pride in his appearance. Getting product that makes his hair all soft and shiny. Wearing the things that make him feel snazzy. Catching his reflection in a storefront and thinking “damn, I look good today.”