Adult nurturing breastfeeding. Isak Berkovitz. Not breast milk. Adult nursing relationships are considered by many to be a sexual perversion in our culture. Hang in there! Never miss a Mercury retrograde again. Sexual fetishism. An adult nursing relationship is a physical, intimate relationship between two people, where one of the to the relationship nurses from a parties. Joel fed from his wife after both her pregnancies. It's also a place to swap tips on how to induce and maintain lactation if you aren't pregnant.