Firefly

[Jayne is watching over Simon and River, who are talking about Saffron.]

River:
She's a liar.

Jayne:
That don't exactly set her apart from the rest of us. The plunder sounds fun enough.

River:
She's a liar, and no good will come of her.

Jayne:
Well, as a rule, I say, girlfolk ain't to be trusted.

River:
[grinning] "Jayne" is a girl's name.

Jayne:
Well, Jayne ain't a girl! She starts in on that girl's-name thing, [reaches into his pants] I'll show her good 'n' all, I got man parts!

Simon:
I'm... trying to think of a way for you to be cruder. I just... it's not coming.

. . .

[Jayne has departed.]

River:
Afraid.

Simon:
We'll be okay. Why the captain is trusting that BOO hway-HUN duh PUO-foo is beyond—

River:
Not her. Jayne.

Simon:
Afraid? Since when?

River:
Since Ariel. Afraid we'll know.