i saw my parents kissing santa claws - green day lyrics

i saw daddy kissing santa claus
underneath the mistletoe
last night
he didn’t see me creep
down the stairs to have a peek
[mike screams “oh god!”]
he thought i was up in the bedroom fast asleep

then, i saw mommy kissing santa claus
underneath the christmas tree last night
there must be some mistake
was i really awake?
i move in closer, but better look away