Read your question and scrolled through the rest.
I am going to be very bold here-get the darn dog fixed!
I can say from personal experience after personally euthanizing over 1500, yes 1500 cats and dogs myself over an 11 month period at the shelter I managed, that too many wonderful, loving, innocent, critters are euthanized daily in shelters across this nation because of folks who didn't get their critters fixed. Having yur pet fixed, does not take away from their personalities it only enhances it.
Your pooch needs more of your attention for at least one hour each day. Take him for a walk, play with him, and when you get home praise him, let him drink some water and he will lie down for a nap.
Please, before any of you breeders pm me or respond to this thread, how many critters have you euthanized? Come stand beside me when I have to put down 3 day old pups, a mother dog and her 11 puppies, etc, etc.
I see you are going to make the right choice jamh for you and your pups sake. Bless you.