This is a brilliant moment.
Here we have Kaylee, a mechanic who is not afraid to get a little (or a lot) of grease on her. She lives a pretty rugged life, but you know what? She also loves pretty, frilly things.
Joss could have taken her down the “I’m a tomboy and I scoff at your girly-things” route, but he didn’t. Instead he took her character and said hey, it’s okay to like engines and like pretty frilly things. You don’t have to give up one because it doesn’t fit in with the stereotype of the other.
THIS is the type of message TV should be sending; that you should never change an aspect of yourself just because you don’t fit into a stereotypical box.
She also gets to be both the cute younger sister character for Mal, and be happily sexual, into the hunky doc and never shamed for it.
except by Jayne who is immediately shut down any time he says something inappropriate about herAlso, when Mal met her, she was in the middle of screwing his mechanic at the time. He didn’t care, and he immediately hired her in the guy’s place when it was made clear that she was a more capable mechanic.