And because she's relatin' to herself, his most important source of help
And mental health,

from Lupe Fiasco – Bitch Bad Lyrics on Rap Genius

Meaning

Since his mom (in this case a single parent) is calling herself a bitch, her son won’t question it and accept this as a fact. He’ll think “My mom’s a bitch” and he thinks it’s positive cause his mom is doing good things for him — helping him and taking care of him

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