(Musetta sings this aria loudly enough for Marcello to hear it, teasing him and making him jealous as the male customers in the café become more and more attracted to the singer!)
Musetta: When I walk out alone along the street all the people stop and stare, and seek out all my beauty from top to toe.
Marcello: (Tie me to the chair!!)
Musetta: And then I relish the sly desire which shines from eyes and can infer hidden beauties from outward charms. Thus the breath of desire whirls around me and makes me happy!