Bacall to Arms Foray voices Lauren Bacall. The title refers both to Hemingway's "A Farewell to Arms" and actress Lauren Bacall, whose acclaimed film debut was in "To Have and Have Not", based on another Hemingway novel, as well as a play on the term "A Call to Arms". Bob Clampett started his directing career with black-and-white animated shorts for the Looney Tunes series, this phase of his career lasting from 1937 to 1941. In 1941, fellow director Tex Avery departed the Warner Bros. Cartoons studio. Clampett replaced Avery as the head of a unit producing films for the Merrie Melodies series, while
What Love Is Made Of extremely positive about "What Love Is Made Of", describing it as "darker than anything" from "On a Mission", while calling it "slinky". The reviewer went on to commend the "irresistibly pouty" chorus. Pitchfork Media's Katherine St. Asaph commented that, in the song, the singer "sound[ed] completely enthralled, by either her lover or the music" and complimented her voice, noting that it seemed "ten times bigger than before". Jordan Sargent of "Spin" magazine called the track "exuberant" and highlighted Katy's vocal performance, which he deemed "typically fantastic", while the team from pop music website Popjustice gave "What Love Is Made Of"