since when do dogs have jellycocks?

no, that's not my concern. Since when do dogs have quadra-balls? I've never seen such things.

Moonbase said:
no, that's not my concern. Since when do dogs have quadra-balls? I've never seen such things.

^This

Moonbase said:

no, that's not my concern. Since when do dogs have quadra-balls? I've never seen such things.

It's called a knot. Basically, when the dog climaxes, it thrusts that bulb into the partner, and inflates it, locking it in. Can't remember why exactly. The inflated knot typically lasts 10-30 minutes depending on the breed and whether or not it's been domesticated

sreven199 said:

Can't remember why exactly.

It locks the semen in, and prevents her from mating for a while to help ensure the offspring belong to the current mate.