I guess this is a sort of shit test, but it happens to me all the time. Make vague comments about something, and when I ask for clarification, I get the response, "Oh, nothing!"

It gets me stuck every time, I guess because I always expect that she has some sort of thing that she is trying to hide from me, and I take it as a challenge to get her to say it. But it never gets me anywhere and usually stops my game mid-conversation.

What do girls mean by this question? Are they doing it as a challenge? To tease? Because they're afraid to say something? Because they don't want to talk about it? Is it a shit test?

How do you respond to this situation?