My friend can hook up with guys at the mall...?

And I can't. We were at the mall earlier and she said "this guy is very good looking"and i said "yeah, i guess, but why does it matter?"and she said: "watch and learn" and she walked up to him and she was flirting with him, and he was going along with it! so now they're probably at the movies because i had to leave. How can I hook up with guys at the mall? my friend tells me that I can too flirt with them because i'm pretty or whatever.