Is goofiness also a sign of flirting?

I want to know what exactly constitutes flirting - obviously there's the overt sexual type of flirting that most people think of, like when you're at a bar or whatever. But what about in daily life if you see the person of interest quite often? Can goofy, silly, unsexual behaviour like pulling faces also be considered a form of flirting?

Put the internet to work for you.

via Personal Recipe 2629979