Here's why:
* Different Species: Horses and humans are different species with vastly different biological structures and genetic makeup.
* Reproductive Incompatibility: Their reproductive systems are incompatible. Humans and horses have different numbers of chromosomes and different reproductive hormones, making fertilization impossible.
* Physical Differences: The physical anatomy of horses and humans is drastically different, preventing any kind of successful mating attempt.
It's important to remember that mixing species for reproduction is not possible and can lead to harmful or dangerous outcomes.