Babylon 5, Season 2: The Coming of Shadows

[Sheridan and Ivanova are camping in his office due to being locked out of their quarters]

Sheridan:
How many Minbari does it take to screw in a light bulb?

Susan Ivanova:
I don't know, sir. How many Minbari does it take to screw in a light bulb?

Sheridan:
None. They always surrender right before they finish the job and they never tell you why.

[Ivanova groans, Sheridan smiles.]

Sheridan:
Knock, knock.

Ivanova:
Who's there?

Sheridan:
Kosh.

Ivanova:
Kosh who?

Sheridan:
Gesundheit. [snickers] I thought that was a good one.

Ivanova:
Were you like this when you were married?

Sheridan:
Huh? Yeah.

Ivanova:
The woman was a saint.

. . .

[the next night]

Ivanova:
Captain, I'd like to note two things for the record.

Sheridan:
Yes, Commander?

Ivanova:
Item One: I don't think this protest is gonna work. Earth Central never gives in when it comes to money. But if you're determined to keep at it, I'm prepared to do the same. Item Two: You snore.

Sheridan:
No, I don't!

Ivanova:
Yes, you do!

Sheridan:
No, I don't!

Ivanova:
Captain, either you snore, or last night we had a hell of a breach in the hull. I get dibs on the couch.