You are listening to Spongebob's:

Spongebob:
What is fun?? HERE...Let me spell it for you!

F is for Friends who do stuff together.
U is for You and me.
N is for Anywhere and anytime at all.

Sea Creatures:
Down here in the deep blue sea!

Plankton:
F is for Fire that burns down the whole town.
U is for URANIUM...BOMBS!
N is for No survivors when you're-

Spongebob:
Plankton! Those things aren't what fun is all about!
Now, do it like this,
F is for Friends who do stuff to-

Plankton:
Never! That's completely idiotic!

Spongebob:
Here, Let me help you...
F is for friends who do stuff together.
U is for You and me, TRY IT!

Plankton:
N is for Anywhere and anytime at all.

Sea Creatures:
Down here in the deep blue sea!

Plankton:
Wait...I don't understand ...I feel all tingly inside...
Should we stop?

Spongebob:
No! That's how you're supposed to feel!

Plankton:
Well I like it! Lets do it again!

Spongebob:
Okay!

Spongebob & Plankton:
F is for Frolic through all the flowers.
U is for Ukelele.
N is for Nose picking, chewing gum, and sand licking.
Here with my best buddy.

(Laughing part)

Sea Creatures:
Down in the deep blue sea.