This is from the episode 'The Night Shift'
SpongeBob: Squidward, I'm working in the kitchen--*giggle*-- at night.
Hey, Squidward! Guess what? I'm chopping lettuce--at night.
Look at me, I'm swabbing the bathroom! At night.
OWWWWW!!! I BURNED MY HAND--at night.
Later, when SpongeBob gets a girlfriend...
SpongeBob: Squidward, I'm fucking my girlfriend--*moan*--in the morning.
