One who desires lactating breasts, often as a sexual fetishism. A true, genuine lactophiliac would consider their desire to nurse one of their basic human needs. Such strong desires are often the leading force in the ANR community- one focused around Adult Nursing Relationships or Adult Breast Feeding. Their are also women who have a strong desire to feed or lactate for another person. Some of these relationships are more focused on nurture and abstain from other sexual aspects in the relationship completely.
Lactophiliacs can be found in the adult breast feeding community.
Somebody who gets off by having sex with cows.
"Farmer Brown he's on crack, he's a lactophiliac"