But come on, why you gotta be picky
I'm saying why you want to have pick me
Continuing with his physics/chemistry references he uses a metaphor to describe that this girls being picky.
Some basic chem here but when an atom loses or gains electrons in a chemical reaction is called an Ionic bond.
He uses the extra electron as the girl and he wants her to pick him (Cl element) and combine to make a new compound which shown below is Sodium Chloride (Salt).
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