Truth of the matter is I'm complicated, you're as straight as they come
You go 'bout your day baby while I hide from the sun

from Bruno Mars (Ft. B.o.B & Cee-Lo Green) – The Other Side Lyrics on Rap Genius

Meaning

Here, he’s saying that you act as if everything is normal and you’re blind to what really goes on behind closed doors. Deep down, he feels he is truly a dark person.

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