This is a song by Ween, from the album God Ween Satan: The Oneness
This song is played really softly so that the volume has to be turned WAY UP to hear it. They softly play a simple guitar and sing the lyrics out of sync with lots of giggling and an apathetic "clunk" of a bad chord at the end when they abandon the song, assumingly to bake further.
The first verse is as follows:
drift away on a puffy cloud,
go away on a puffy cloud
my brain is dead from too much pot
cuz (gene) (dean) + i smoke too much pot.
That tells you something you didn't know, doesn't it?
The parts with their names in parentheses indicate that they're each saying each other's names, by the way.
This song is © 1990 by Ween, Twin/Tone records.
Check out Ween's next album, The Pod.