While Jenny Lewis explicitly names three distinct gendered categories in her 2014 Voyager track, "Just One of the Guys" (the girls, the guys, ladies without a baby), one of the named genders mentioned therein (ladies without a baby) suggests the existence of a fourth distinct gender left unnamed (ladies with a baby).
Further evidence for the existence of a fourth Lewisian gender can be found in the singer's invocation of the possible supercategory of ladies, as in "I'm not gonna pay for you / That's not what ladies do," which would theoretically contain ladies with a baby and ladies without a baby both. That is to say, that whether a lady is with a baby or without a baby—a baby being an accessory to gender, rather than a discrete gender all its own—there are things that she simply does not do, including but not limited to: breaking for you, praying for you, or paying for you.
