Andy wildlife breeding

WHY DOGS GET STUCK WHILE MATING

During mating, a male and female dog get stuck together in what is called the "copulatory tie" or "lock". The "copulatory tie" occurs when the bulbus glandis, an erectile tissue structure located at the base of a male dog's penis, engorges with blood. This happens just after the male inserts his penis into the female's vagina and he begins to thrust. The bulbus glandis swells quickly and forms a spherical enlargement, twice the diameter of the shaft of the penis. The circular muscles located just inside the female's vagina, called the constrictor vestibuli muscles, contract against the bulbus glandis, completing the lock and preventing the penis from being withdrawn. The two dogs are now tied together.