If you have one dog urinating in the house, the other is going to as well. At least that has been my experience. When we first got Jake and were dealing with having to housetrain him, he was jumping the gate and peeing on the dining room carpet. My cats both decided if he could, they could. We are still fighting the battle with them, even though, he has now stopped and the carpet is gone. They are using the dogs beds for their bathrooms. I've never heard of male dog hormones causing them to mark inside the house. Max is 1.5, intact and has never marked in the house, knock on wood. All 3 of my dogs will mark every shelf and display corner in Pets Mart if I don't keep them to the middle of the aisle and away from them. I know that is because a million other male dogs have already done the same thing and they smell it. I tried diapers for my Springer, at 13, she was practically completely incontinent, but all it did was create a nightmare, with her fur and cause a severe skin irritation around her groin area. Good luck.
Kathy