How does a male dog get stuck to a female dog during mating?
Mating is a relatively brief process; they mate, and then they separate. They do not get stuck.
It is because, the dogs male organ expands after it enters the female dogs vagina. This makes it difficult for the male dog to retract his organ. This expansion or swelling will last for around 5-10 mins and the two mating dogs have to be stuck to one another during this duration. Once the swelling subsides the male dog would be able to retract his organ and get away from the bitch