And naw that ain't your girl, dog, but you be feelin' that chick
Here he admits how he thinks about her while he’s getting with her. He knows these feelings (mentioned in previous lines) he gets aren’t real because he’s not even in a committed relationship with this girl, but something about having sex with her makes it seem like he’s so much more into her and cares about her more, even tho it seems he understands this may only be a temporary feelings because the sex is just ephemeral and temporary.
He also uses two animal names that are commonly used for people, dog and chick.
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