"The F.U.N. Song" is a song about friendship. Spongebob sang it to Plankton, to teach him the underlying qualities of what friendship really means, in the episode "F.U.N.".
Lyrics:
{Speech}
Spongebob: It's not about winning, it's about fun!
Plankton: What's that?
Spongebob: Fun is when you... fun is... it's like... it's kind of... sort of like a... What is fun? I... Let me spell it for you.
{Singing}
F is for friends who do stuff together
U is for you and me
N is for anywhere and anytime at all
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--
{Speech}
Spongebob: Plankton! Those things aren't what fun is all about! Now do it like this!
{Singing}
F is for friends who do stuff to--
{Speech}
Plankton: Never! That's completely idiotic!
Spongebob: Here, let me help you.
{Singing}
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
Down here in the deep blue sea!
{Speech}
Wait, I don't understand this. I feel all tingly inside. Should we stop?
Spongebob: No, that's how you're supposed to feel!
Plankton: Well, I like it! Let's do it again!
Spongebob: Okay!
{Singing}
Both: F is for frolic though all the flowers
U is for ukelele
N is for nose picking, chewing gum, and sand licking
Here with my best buddy!
