Flute

Q: What's the definition of a minor second?
A: Two flutes playing a unison.

Flute players spend half their time tuning their instrument and the other half playing out of tune.

Q: Why do loud, obnoxious whistles exist at some factories?
A: To give us some sort of appreciation for flutes.

Q: What is perfect pitch on a flute?
A: When it misses the rim of the toilet as you throw it in.