"Nipple stimulation" refers to the act of touching or rubbing the nipples, which can provide pleasure or arousal, particularly during intimate activities. Full definition
This can happen for many reasons such as medications mama needs to take or a lack of nipple stimulation by baby to cause milk production. (organic-baby-resource.com)
You can try nipple stimulation, using your hands, or a breast pump to stimulate your nipples. (verywellfamily.com)
Milk supply is driven by nipple stimulation and milk removal, when we mess with that bad things happen. (cathalekibclc.com)