This can be a result of physical reasons (soreness) or psychological reasons (conflicted about her breasts being used other than for an infant).
Because female breasts and nipples are generally regarded as an important part of sexual activity in most cultures, it is not uncommon that couples may proceed from oral stimulation of the nipples to actual breastfeeding.
The relationship of both partners is based on equality and mutuality.
Or there are cases where breastfeeding was interrupted for an extended period of time as a result of infant prematurity, infant absence, or mother's illness (taking prescription medication).In such cases, adult nursing has often caused lactation to continue until it was possible for the child to resume breastfeeding.Some women experience sensual pleasure from pumping milk from their breasts or expressing milk manually—with or without a partner.In addition to the sensual pleasure, women have reported feeling more feminine while producing milk and continue with lactation for emotional or sensual reasons after weaning a baby.Researcher Nikki Sullivan, in her book A Critical Introduction to Queer Theory, calls erotic lactation a manifestation of "Queer." She defines Queer as an ideology; that is, as a "sort of vague and indefinable set of practices and (political) positions that has the potential to challenge normative knowledges and identities." Drawing on a statement of David Halperin, she continues "since queer is a positionality rather than an identity in the humanist sense, it is not restricted to gays and lesbians but can be taken up by anyone who feels marginalised as a result of their sexual practices." The heteronormative profile of breastfeeding assumes certain norms: Any kind of sexual activity which includes the woman's milk.
Such activity is widespread, and often unintentional, in the time after a woman gives birth, since many women experience a let-down reflex (releasing milk) when sexually aroused.The association of pleasure and nutrition holds true as well for the lips, also erogenous zones, where pleasure may have led to "kiss feeding", in which mothers chew food before passing it on to the child.Unintended milk flow (galactorrhea) is often caused by nipple stimulation and it is possible to reach normal milk production exclusively by suckling on the breast.Breastfeeding in general is considered by some to be mildly exhibitionary, especially in Western societies (see breastfeeding in public).Breastfeeding mothers have faced legal ramifications for nursing their children into toddlerhood or in public, or for photographing themselves while nursing.The suckling of milk from a female's breast on a regular basis from one or more partner(s).