Adult breastfeeding occurs when an adult male takes breast milk which has been pumped from a lactating breast, or directly from the breast itself. Adult breastfeeding has been practiced and discussed for centuries around the world.http://www.uic.edu/classes/osci/osci590/9_4%20The%20Anthropology%20of%20Breast%20Feeding.htm While breastfeeding more commonly relates to milk originating from women's breasts in the practice of ANR, men have been known to attempt lactation through nipple stimulation as well.http://www.scientificamerican.com/article.cfm?id=strange-but-true-males-can-lactate Outside of adult nursing relationships, adult breastfeeding is used by some adults for the treatment of health issue because it is believed to be hypo-allergenic and full of calories and nutrients.http://www.webmd.com/parenting/baby/breastfeeding-9/breast-feeding-diet There are also many psychological and health reasons why adult breastfeeding is a healthy choice for mature individuals in a consenting adult relationship. While some adult nursing relationships are sexual in nature, others are intimate relationships that may or may not include sexual intimacy.

Breast milk has been shown to possess antibacterial and antimicrobial properties, and it comes in its own ecological container: the human breast.http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1956129/pdf/canmedaj01536-0009.pdf It doesn't spoil prior to being released by the body, and contains healthy immune building proteins, good fats, and is said to have a general sweet taste to it.http://www.telegraph.co.uk/health/healthnews/7611360/Breast-milk-kills-cancers-claim-scientists.html Patients worldwide have used breast milk to aid in boosting their immune systems and because it is easily digestible by stomachs of all ages that might be queasy as the result of cancer therapy treatment.http://www.aolhealth.com/2010/04/21/substance-in-breast-milk-kills-cancer-cells/