Guys, How obvious do girls need to flirt for you to notice?

Anonymous
People always say guy don't notice the subtle way girls flirt. But I think they're not complete morons, so at some level of boldness, guys should pick up the hint right?

So therefore: if a girl and a guy are friends or friendly. What is the least she would need to do for you to know she's flirting?
Guys, How obvious do girls need to flirt for you to notice?
17 Opinion