Nipple stimulation

Nipple stimulation is a sexual act of humans. Stimulation of the nipples is known to cause the body to release a hormone called oxytocin. Oxytocin is known to aid in the bonding of individuals. When a woman is breastfeeding, the frequency and the sucking of the baby will regulate the production and the amount of milk.

References

↑ Amico, Janet A.; Finley, B. E. (1986). "Breast Stimulation in Cycling Women, Pregnant Women and a Woman with Induced Lactation: Pattern of Release of Oxytocin, Prolactin and Luteinizing Hormone". Clinical Endocrinology. 25 (2): 97–106. doi:10.1111/j.1365-2265.1986.tb01670.x. PMID 3791664.

[1] Amico, Janet A.; Finley, B. E. (1986). "Breast Stimulation in Cycling Women, Pregnant Women and a Woman with Induced Lactation: Pattern of Release of Oxytocin, Prolactin and Luteinizing Hormone". Clinical Endocrinology. 25 (2): 97–106. doi:10.1111/j.1365-2265.1986.tb01670.x. PMID 3791664.