"Yummy" is an undeniably catchy song. The upbeat R&B track begins with the chorus, which opens with the lines, "Yeah, you got that yummy-yum / That yummy-yum, that yummy-yummy / Yeah, you got that yummy-yum," (via Genius).
Yummy is a term used to describe someone or something that you find very attractive. In this case, Justin Bieber is singing about his wife, supermodel Hailey Baldwin. Throughout the song, he sings about how Baldwin keeps him centered, enjoys the finer things in life with him, and is his number one girl.
Bieber gets this message across in the first verse with the lyrics, "Bona fide stallion / Ain't in no stable, no, you stay on the run / Ain't on the side, you're number one / Yeah, every time I come around, you get it done (you get it done)." In an interview with Ellen DeGeneres, Bieber confirmed that "Yummy" is about his sex life with his wife, (via YouTube). When DeGeneres asked him outright what the song is about he replied, "My sex life." He continued, "I mean it is what it is. I'm married."