What gives the subjective sensation of 'me', 'Awareness' tied to this specific body-mind complex?

What is it that experiences life from this particular body & mind that I have? i.e. why am I experiencing the world from my body instead of yours? I feel like an answer could be: because there isn't really any 'separate bodies' or selves & you just don't have the realization (Anatman) yet. Still, what causes the subjective 'self' to appear as a particular body experiencing life from its limited perspective, or is it all one giant reification error for someone who hasn't detached from egotic self yet? & then karma, the 12 links, mindstream identifies with this, attaches to this body, so on and so forth...