I don’t mean the fact that she has sex, I just didn’t see what she saw in that guy. Sure he was a mechanic, but she was clearly a much better one than he was. Plus he seemed kinda sleazy and dumb - pretty much completely unlike Simon.
Maybe she likes them big, blond, and stupid?
Didn’t that guy say, “engines make her hot?” I don’t think she cared about that guy at all, she wanted to get on her back and get a good look at Serenity’s engine.