To Breed means to partake in the action of Breeding.
Breeding is the action of male and female animals having sex (or mating) to reproduce, and procreate.
Animals, including Humans breed with members of the opposite sex within their own species due to a desire for sexual pleasure, love, and the need to
propagate the next generation.
Without Breeding no Human being would be alive. Thus Breeding is essential to the existence of Humans and animals (unless they are a part of the small minority of species that
reproduce asexually).
Heterosexual sex is the only kind of sex that can be described as Breeding.