A combination of funk, pop, and soul music, "Pyromaniac" features a hook with repetitive lyrics and was compared to the works of several artists, including the Cardigans, Robyn, and Phoenix.

The album's second single overall, "Pyromaniac" was released as a digital download on 2 September 2013 by Tusk or Tooth Records and A:larm Music; it was distributed exclusively in Denmark.

Additionally, several musicians contributed to the track, including drummer Nathaniel Morton, Todd Simon who played brass instruments, and Zeph Showers who served as the head audio engineer and mixer.

[7] Gaffa's Michael Jose Gonzalez listed "Renaissance Girls", "My Boxer", and "Pyromaniac" as three potential hits from Wish Bone in his album review.

[4] In a more mixed review, Christopher Monk from musicOMH felt that the song (and the parent album) was not "lacking in hooks" and considered it one of Wish Bone's strongest tracks, but overall said that it (along with "Bird in an Aeroplane" and "Cherry on Top") cannot match the quality or catchiness of her previous singles, listing "Sun of a Gun" and "White Nights" as two examples.

[8] Similarly, Hannah Eads from The Daily Nebraskan considered both "Pyromaniac" and "Renaissance Girls" to be "just as edgy and catchy as the first", but claimed that "the songs contribute nothing new to the genre".