At that I ran to the phone sayin' baby I'm alright
I said but unlock the door because I forgot the key

from The Weeknd – D.D. Lyrics on Rap Genius

Meaning

Setting up the ultimate ending to the song:

After resisting the groupie throughout the whole song, trying to remain faithful to his girl back home, he calls his girl, like every other night, to assure her he’s okay. But she’s met with a surprise, illustrated in the next line…

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