Sherlock, Series 1

John:
You don't have a girlfriend, then?

Sherlock:
Girlfriend? No, not really my area.

John:
Oh right then. [pause] Do you have a boyfriend? Which is fine, by the way-

Sherlock:
I know it's fine.

John:
So you've got a boyfriend?

Sherlock:
No.

John:
Right, okay. You're unattached, just like me. Fine. Good.

Sherlock:
[After an awkward pause] John, um... I think you should know that I consider myself married to my work and while I am flattered by your interest I'm-

John:
No-

Sherlock:
-really not looking for anyone-

John:
No. I'm not asking- no. I was just saying. Its all fine.

Sherlock:
Good. Thank you.