Be me 22M

Go through fast food drive-thru

Place my order at box

Think my voice is attractive because it's not the first time a woman sounded excited to see me only after hearing my voice

Go to window and it's not the chick I was talking too (different voice, no headset), which I thought was a little weird

Hand other chick my card and continue listening to my youtube video as I wait

Chick with headset comes to window when my head is buried in my phone and quickly opens window, hands me my food, and quickly turns around and bounces, so I didn't get a good look at her (made out she was at the lower end of 5ft., not fat, blond and wears glasses). She didn't give me my card back

Chick w/out headset comes back and hands me my card, doesn't say a word, is smiling and hands me a flyer.

"What's this?"

No response, and shuts window, I can see her smiling and talking to chick with headset whose back is turned to the window.

Look at flyer and it's obviously the chick with the headset's phone number.

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So I didn't get a good enough look at her to tell her age, but got her number, she works at a fast food place in a semi-close vicinity to a high school (could be 16 or 17). I haven't texted her yet. I'm terrible at telling if a girl is my age or underage (like an older looking 16 or 17 year old) and I am terrified of getting a charge for this, but I am tired of using it as an excuse not to talk to women. 1). Should I text her, or is it not worth the hassle, and does the fact that I'm asking this mean I'm low SMV and don't have abundance? & 2). If I do text her, how should I go about verifying her age so I don't end up on MSNBC talking to Chris Hansen instead?