Breast feeding

Breast feeding or nursing was the act of using one's breast to nurse a newborn infant. In Humans, females are geared for nursing the young. 

Once during the Bajoran Occupation, Kira Nerys was conducting reconnaissance in the Bestri Woods when she thought she saw a Cardassian and opened fire. After hitting the target she discovered that she had killed a mother hara cat that was nursing her young. 

When William T. Riker was hesitant at eating gagh, it was jokingly suggested that he might as well have one of the Klingon females breast feed him, comparing him to an infant. 

In 2367, Junior was compared to a baby nursing from her mother, in this case, the USS Enterprise (NCC-1701-D). 

In 2371, during Jadzia Dax's zhian'tara, Audrid Dax, in the body of Quark, spoke of the joy of holding a baby to one's breast and nursing it. 

''In an alternate timeline, shortly after giving birth, Samantha Wildman planned on breast feeding her newborn daughter, Naomi. The Doctor informed her that, since she lacked the scales of Ktarians, she would be unable to breast-feed in three to four weeks when Naomi's incisors erupted.''