Sexual attraction comes in many forms. Even unconsciously. Sexual attraction isn't just boobs, vagina, penis. Physical is just the raw form of sexual attraction.
Sexual: relating to the instincts, physiological processes, and activities connected with physical attraction or intimate physical contact between individuals.
Attraction: the action or power of evoking interest, pleasure, or liking for someone or something, a quality or feature of something or someone that evokes interest, liking, or desire. a thing or place that draws visitors by providing something of interest or pleasure.
Hence something being "cute" (attractive in a pretty or endearing way) is still considered an attraction. And physical attractiveness is still considered by definition, sexual in a form. Sexual doesn't have to mean "wanting to have sex". It could also be "hanging out with a person because they are psychically attractive." or because the person has a "a quality or feature of something or someone that evokes interest, liking, or desire."