So Asylum.com has posted "A guide to reading flirting body language" and here's an excerpt.
In this photograph, the woman's right foot is pointed in, taking the weight off her right hip and causing her left foot to support all of her body weight.She's non-consciously drawing attention to her neck, which is a bit of an invitation," says Hogan. "That, combined with her very off-balance posture, could be interpreted that she likes you and trusts you."
Now before you guys try "reading" every girl with Asylums How-to-Guide. You need to remember two things.
A.) Context is everything.
Just because some girl is tilting her head back exposing her neck doesn't mean that she's into you. Instead, use your instincts. Unless you have no game at all, you should be able to tell if a girl is flirting with you or just talking with you because her hotter friend is talking to your hot friend. Trust yourself, don't get caught up in semantics. I've seen nice guys get sucked into what I like to call the I need attention syndrome that girls tend to exhibit when all the guys are talking to her friend. The nice guy starts the conversation, then buys the girl a drink only for the girl to say "Thanks" and walk away. Don't be that guy.
B.) Eye Contact is everything
While body language is a great indicator for how things may be going or whether she is interested, you should be so focused on what the girl is saying and looking in her eyes, that you should never notice what the hell her foot is doing. Get it? Be a good listener. The best way to force yourself to listen to whatever mindles dribble she may talking about is to look into her eyes when she talks. This doesn't mean shoot lasers from your eyes into hers, don't stare her down. Let her know you're listening and focused on her, not the other blonde 4 seats down the bar. If she's smart she'll do the same when you're talking. If she doesn't feel free to move on. Just remember as always, trust yourself.
Be. Bold.