Aside from the obvious* you should neuter your dog so when you bring it to the veterinarian for it's annual visit it doesn't PISS ALL OVER THE PLACE!!! And do not, under any circumstances, tell me that you want your children to experience the miracle of birth. That's why they have dvds.
* unneutered pets contribute to the problem of too many animals. Too many animals + not enough homes = millions of cats and dogs euthanized every year. millions.