The following poem is hardly a true haiku. Yes, it has three lines and follows the proper syllable count and is very simplistic but lacks imagery like I believe the Japanese intended.
I would call this psyku, a pseudo haiku poem. Humerous, mabe even slightly witty, but pants are not image-filled writing.
Other forms of haiku are cinqku, dodoitsu, epulaeryu, monoku, senryu, and questionku. There maybe even more.