Man Fucks A Female Dog - Beastiality Animal Sex.mpg -

: Biological research indicates that both humans and dogs experience a release of oxytocin —the "love hormone"—during positive interactions, creating a bond similar to that of a parent and child.

If the goal is to write a story where the dog is a surrogate for a romantic partner (filling the emotional void of a lover without the physical aspect): man fucks a female dog - beastiality animal sex.mpg