The L Word, Season 1

Dana:
[after seeing an exchange between Jenny and Marina] I thought Jenny was straight.

Alice:
Dana, most girls are straight until they're not. And then... sometimes they're gay 'til they're not.

Shane:
True, but there are also the ones that never look back. Right? And you can spot them coming a mile away.

Dana:
How can you tell?

Alice:
You read the signals.

Dana:
That's my problem.

Shane:
Dana, it's not a problem. Alright?

[Dana rolls her eyes]

Shane:
Sexuality is fluid. Whether you're gay, or you're straight or you're bisexual -- you just go with the flow.

Dana:
No, no, no. That, is my problem, okay. I can't feel the flow. That... thing, whatever it is, I don't got it.

Alice:
You don't have gaydar.

Dana:
No.

Alice:
You're so right, you don't have it!

Shane:
Everyone's got it. You just have to tune it in.