I wonder what's the fertility thing suppose to mean?

Also is the dog's balls inside the shaft of the penis?

Kiros72 said:

I wonder what's the fertility thing suppose to mean?

Also is the dog's balls inside the shaft of the penis?

Probably either a bad choice of words for her pleasure level or interspecies impregnation fetishism.

No, it's called a knot. It's what holds mated dogs together, probably to keep the female from mating with another until fertilization is complete.

OOZ662 said:

Probably either a bad choice of words for her pleasure level or interspecies impregnation fetishism.

No, it's called a knot. It's what holds mated dogs together, probably to keep the female from mating with another until fertilization is complete.

Thanks for the info, I've never had a dog before.

Kiros72 said:

Thanks for the info, I've never had a dog before.

The knot is also intended to prevent any sperm from exiting the vagina to ensure maximum chance at fertilization.