Definition – What is Breeding (Impregnation) Fetish? What Is the Difference Between a Breeding Fetish and a Pregnancy Fetish? Breeding Fetish in Cuckolding
What Is a Breeding Fetish?
A breeding fetish is a strong attraction to the idea of getting — or getting someone else — pregnant. Frequently, this fetish involves a person with a penis ejaculating into someone with a uterus, “breeding” them. People with a breeding fetish generally enjoy the “risky” feeling of potentially permanent consequences from a sexual act. They may also enjoy a feeling of power exchange, where one partner is “submitting” to the other.
For some, breeding fetish may be more about role-play and fantasy, and partners engaging in it will use contraception. But for many, breeding fetish involves the exchange of body fluids, so partners risk getting STDs (sexually transmitted diseases) in addition to a potentially unwanted pregnancy. 
What Is the Difference Between a Breeding Fetish and a Pregnancy Fetish?
A pregnancy fetish is an attraction to pregnant people. The fetish might include an appreciation for how bodies change during pregnancy. On the other hand, a breeding fetish is focused on the act of impregnation. 
Breeding Fetish in Cuckolding
Breeding fetish has an especial place in cuckolding. Cuckolds love the idea of sharing their wife/girlfriend with another man. Sometimes this sharing can include them being passive or Humiliation. And the idea of a cuckold’s wife/girlfriend got breeding by another man is one of the ultimate cuckold fantasies.
Many couples who are into cuckolding roleplay breeding fetish together or while they are with another man threesome or wife sharing sessions.
There are very few cuckolds couple who may go through all the way to actually do that by choice. Since some of them can happen by accident or because of the wife or girlfriend actually cheating without telling her partner. Even the plain act of Hotwife sex with another man has the risk of impregnation.
One of the main reasons cuckolds enjoy breeding fantasy in their relationship is because of Sperm Competition theory. Of course, cuckold men do not think all of these while they are in the act of cuckolding and all of these are just subconscious.