Babies Suckling on Junk Food Remind Nursing Mothers to Eat Healthy

The Pediatric Society of Rio Grande in Brazil wanted to remind new mothers that, for the sake of the babies that they nurse, they should eat healthy food. Body paintings of junk food on the breasts of nursing mothers communicate that mothers are feeding their babies bad food when they eat it themselves.
It's a clever advertising approach by the ad agency Paim. But I'm curious about whether it makes any medical sense at all.