Castle, Season 4

Castle:
So. What are we gonna do?

Beckett:
About what?

Castle:
Well we have to tell Ryan about Jenny.

Beckett:
What? Why? Castle, if we were getting married would you want to know about all the guys that I've slept with?

Castle:
All?

Beckett:
Seriously? You sign women's chests at book readings. You cannot be shocked that I'm not a virgin.

Castle:
I - it's just the word -all- suggests a lot. How many are we talking … exactly?

Beckett:
Are you really asking for my number?

Castle:
You show me yours, I'll show you mine.

Beckett:
(amused) Men. You all wanna know, but you don't wanna know. Listen, every woman has her secrets, including Jenny. And sometimes, for the sake of a relationship, it is better not to share.