1. Imagine you're in high school. A girl you want to fuck says to you, "I'm going to visit Brian after school." You correctly interpret this as a shit-test. She directly challenged you and wondered how you'd react to such a situation.

2. Imagine you're at a bar 5 years later. You've started to work towards your goals and are a bit better than you were in high school. A bit fitter and a bit closer to your career goals. A girl you want to fuck says to you, "I was with Mark for a few years in college, we went to Cancun for a few weeks last year. Did you do any fun traveling?" You also correctly interpret this as a shit-test. She is asking you (not so subtly) how you compare to her past guys in terms of life experience.

3. Imagine you're at an outdoor beach bar 2 years later. You've worked out more and are looking extremely fit. Whether or not you've hit your financial goals yet (this is what you focus on for the rest of life once you've gotten sex taken care of), you have a strong stoic mentality towards life and thus are a bit more confident. A girl you want to fuck says to you, "Hmm, I don't know if you can handle how we party down here."

All three are examples of shit tests.

1. The first is actually an unintentional shit-test by the young girl. It's the girl's brain actually learning how the top guys act. She isn't challenging you directly or on purpose. But some of the guys who are way more confident than you actually laugh at why she's visiting Brian, and convince her to spend time with them. She didn't realize that shit-testing was even a viable method for filtering out guys. And that won't be figured out for about one more year. But she is starting to realize that there's a difference between how different men react to the same situation. Maybe part of her deep down wonders if she can use men's reaction to test guys' worth.

2. The second is intentional. It's saying that you may be one of the men she'd allow to fuck her, but you must prove your worth. It's a clear indication that you're on the borderline. Obvious shit-tests like this, which wouldn't be done towards larger, leaner, or wealthier guys, just says you're on the right track but not there yet.

3. The third is like an inside joke between two sexual beings. At this point, her shit-testing is more like flirting. You've already passed her internal tests by "being hot" (which girls don't even know what that word means, they just follow their evolutionary instincts. I'll tell you: it just means being able to squat deadlift and bench a lot while having a lot bodyfat percentage). After seeing you, she's just confirming her notion that you're fuckable. She's just doing some final last minute checks. You'll probably pass these tests by joking back with her, and it's an opening for you to tease her a bit.

Increase your fitness and life experience, and you progress from 1 to 2 to 3.