Some indoor urination in dogs can be marking--thus territorial--behavior, but this is most common in particularly territorial dogs, adolescent males (or more territorial females), and dogs with behavioral problems. Most dogs can easily be taught not to urinate indoors.
To a dog, the house--aside of the dog's sleeping area--is just an extension of the outside world unless it is taught otherwise. Most don't understand, without training, that it is inappropriate to relieve oneself in the living room. After all, that's not a place where he has to sleep and, even if he does sleep in the living room, he can just pick a place he hasn't urinated.
Dogs are intelligent and trainable creatures, however, and once they understand that it is proper pack etiquette for the 'pack' that is your family for him to urinate outside, barring other problems, you'll generally have a housebroken dog. Difficulty in housebreaking varies greatly by both breed and individual dog.
no
Their scent.
from their urethras the same as male dogs and ALL other mamals who urinate!
Yes, this is a normal behaviour in adult male dogs. Sometimes male dogs that were neutered too early do not raise their leg to urinate, however.
It is instinctual for dogs to mark spots to show rival male dogs where their territory ends and begins.
Male dogs tend to lift up their legs and urinate off to the side, in all breeds.
Some male dogs could be aggressive but not all of them especially if they are highly trained because then they are taught not to bite or misbehave in any inappropriate behaviors.
Most male dogs who have not been spay or neutered have dominant personalities. Just like marking their territory, urinating on an object shows dominance over it. I recommend Ceasar Milans 'Be the Pack Leader' or 'How to Raise a Perfect Dog,' these are incredible tools that offer's great insight into a dogs personality and tendencies.
The male will feel pressure in his bladder that tells him it is time to urinate.
Male dogs lift their leg so they can direct their urine to mark their territory. They will typically urinate on the side of a post, tree or whatever is available for them to leave their mark on.
to mark its territory or because noone takes it outside to use the bathroom.
You can still urinate during an erection.