How 'bout the phrase “what concern is it of yours what I do and do not drink?”

A: Want some booze?

B: Nah, I’m good.

A: OK.

That’s the mature conversation. Since most people aren’t like A in this conversation, however, I tend to actually experience:

C: Want some booze?

D: Nah, I’m good. [N.B. this presupposes I don’t want some booze: I’m not a teetotaller, but I’m not always in the mood for booze]

C: Why not?

D: In what way does your knowing the reasons make this anything beyond an increasingly awkward conversation?

C: Asshole!

D: Whatever.