The song, a playful and suggestive tune, was often referred to having something related to sexual themes. Bainbridge stated that "(Any sexuality on "Mouth" was) not deliberate—it was definitely not a sexual song. It's just honest—about a relationship, how you feel in a relationship.
The song, characterized by its playful and suggestive nature, was commonly linked to sexual topics. Bainbridge asserted that "(Any sexuality in 'Mouth' was) unintentional—it absolutely wasn't a sexually themed track. It's purely authentic—about a connection, how one feels within a relationship."