Dogs don't think of 'them' like human males do!
I get my boys done because I don't want them wandering. Used to do rescue work and took in quite a few boys who wandered off cruising for chicks until they were neutered.
When I was a kid, our unaltered 13 year old GSD bred the neighbors Samoyed. That made an impression. Too many unwanted dogs in the world.
They can also get testicular cancer if they're not altered.
I also don't like the icky boy behaviors. Not all of them are icky but Otto was. He got a vasectomy for his first birthday.
Some people say to wait until they're 2 and done growing, they need the testosterone for solid bone mass and muscle. Was not an issue for Otto.