headcanon:
Cisco built himself a robot friend as a kid, his parents took it away.
He heard this song on the radio and learned it as soon as he got back to his place.
https://api.soundcloud.com/tracks/276368922/stream?client_id=N2eHz8D7GtXSl6fTtcGHdSJiS74xqOUI?plead=please-dont-download-this-or-our-lawyers-wont-let-us-host-audio
Cisco backup 