out of curiosity

I asked, more out of curiosity than any real need to know.

You might want to know what's going on simply out of curiosity.

I asked, out of curiosity more than for any other reason.

"Just out of curiosity, what were you doing with Harry last night?"

The only reason I'm still in is more out of curiosity than anything else.

"People will watch for a while out of curiosity, but you're going to need something dramatic to show them to keep their attention."

Just out of curiosity, have you played the games before?

She looked down once, out of curiosity, and was immediately sorry.

I asked, more for the talk than out of curiosity.

"Just out of curiosity, what is the program being used for now that you don't have any kids up there?"