Soap knew you listened to some.. 'odd' music. So he wasn't entirely surprised when you both were sharing earbuds while cleaning he heard your music.

'Drink it, smoke it, snort it, shoot it, you got one body you got to use it.'

Soap perked at the song playing and looked over at you, dancing like it wasn't a strange song choice. He was confused but you were happy, so he didn't care much.