Yeah, but she couldn’t get a date 'twasn’t run on batteries.
I call her Hottie Betty.
I’ve always had a thing for Janeane Garofalo. 
The only available men on the ship were Simon, Book, and Jayne (if, like Kaylee, you were a Mal/Inara shipper). Remember that she met Mal by sleeping with his previous mechanic just to see Serenity’s engine (though that led to her taking his job); that’s hardly in line with the typical “can’t get a date/scared to talk to boys” persona the thread is about. In fact, the line you quoted, said in front of everyone, is further evidence that Kaylee was hardly a demure shrinking violet.