Out of curiosity

5th May 2024

Out of curiosity

We use this expression to say that we did or are doing something because we were/are interested to know.
Usage
Written: 
Yes
Spoken: 
Yes
Formal: 
No
Informal: 
Yes
Example 1
You weren't in when I called last night. Out of curiosity, where were you?
Oh, yes. I was with some friends who I hadn't seen for years.
Example 2
Are you going to see Jim later?
Yes. Why?
Well, just out of curiosity, can you ask him where he got his boots. They're really nice.