Shameless Summer flirting

I remember this one line out of a book (by Albert Camus, of all people) that revealing one's intentions too early is a universal deal-breaker. My question is, does flirting fit under that?

Sure, it's light, that I know, but such comments are a bit off-setting too. And I can't help but get so nervous or internally crazy just thinking of what I was about to say or already said. Like what happened yesterday:

Guy: I'm back
Me: (commenting on previous words) You've got an unusual amount of energy for this hour
Guy: yeah well, at least on AIM we can just type watever we feel like
Me: Are you human right now? You just ran a mile.
Guy: I'm Superman!
Me: Does that make me Lois Lane?

I could just smack myself on the head.