I don't know about that "curious thing"... in some cases it would work. If you are asking a guy about something non specific....like what guys think about "girls who ask guys out"
But if you turn it into a question that is specific to him ... like "Are you seeing anyone else, I'm just curious?" It doesn't matter how you word it... if he is a liar he will still lie becasue you put the focus on hiim
the whole idea of being someone who is just curious and not up tight about the answer is big.... but just remember there are guys who lie because they are losers. and there are guys who don't ..period!
and of course there are guys who willredirect the question because they are nervous about how you will react,,,,