Because when a dog mates with another they become bonded and love each other, therefore make better puppies the next time around.
NO! It's too dangerous!
Separate them
Dog locking is simply another term for canine mating. During their mating routine, the male dog's penis swells into what is called a knot. The knot fits behind the female's pelvic bone, and they are basically locked together until the mating it complete and the knot goes back down. That is why you should never pull mating dogs apart. It can injure both the male and the female. Once they start, you pretty much have to just let them finish.
i had to laugh at that, but possibly let him calm down and keep them in a separate room or something
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Yes. Separate them.
As soon as spawning has finished she should be removed. The male will chase the female and kill her otherwise.
get them fixed at the vet
yes
cold water
About 5 to 20 min ... is a normal mating duration.
Wait until they are finished, when they are finished, separate them immediately, if not done fast enough, possible fighting can occur.