What's the meaning...

On the way to work this morning...

Bf: Let's go get breakfast.
Me: Ok.

Bf: This shop's 'siew mai' (steamed shrimp + pork dumpling) is not nice.
What do you wanna eat?
Me: Anything.

Bf: So, you want 'char siew pao' (pork bun)?
Me: No.

Bf: I thought you said "Anything?"
Me: (Silent)

Bf: What do you wanna eat?
Me: 'Siew mai'.

Car door opens.
I heard Bf mumbled in bewilderment,
"Argh... What's the meaning of 'Anything'?"

Haha. In this case, I also don't know.