Stinkfist

Paul D'Amour, Tool's former bassist, was one of four contributors to the songwriting of "Stinkfist", a track from the band's second studio album, Ænima, released in 1996. The song came out as the only commercial single from that record, and it arrived just after D'Amour's departure, with Justin Chancellor having replaced him in 1995. Many radio and television programmers found the title too offensive to say aloud, so the track was often listed as "Track #1", and the originally released version was shortened and altered for broadcast.

Maynard James Keenan later explained that the words "stink" and "fist", and the sexual reading they invited, were actually symbolic. The lyrics dealt with a friend of drummer Danny Carey who "isn't afraid of getting his hands dirty", with fisting used as a metaphor for the real cause of ailment rather than a write-off of the sexual term. The track was also remixed by Skinny Puppy.

The music video was directed by the band's guitarist Adam Jones, who had prior experience in art direction and animation, and was made with stop-motion techniques featuring live actors. It followed two members of a race of sand people who swallowed nails and wires that hurt them and were ejected from their bodies, then treasured in jars. One character peeled off sandy skin to reveal a tattooed layer beneath, and a tumor-like life form grew from the main male character's left shoulder. A reviewer compared the visuals to H. R. Giger's Biomechanical art. The video reached heavy rotation on MTV, though only under the name "Track #1".