I have to speak from experience about having an unneutered male. I am sad to learn after the fact that my vets when Spockie was younger were not as savvy about neutering as they should have been, and one even talked me out of it once. I think now it was because of their lack of skill, not his needs.
He was a content, social bunny for 8 years. Could he have lived longer if neutered? I can’t know, but would have done it if there was any possibility.
He was alone with me, so directed his affections to me. I worried that he would have liked a mate, but was in no position to own a second bun. I hadn’t found this site yet, either. He seemed very happy throughout his life, but if I had it to do over, I would definitely have neutered him.
And a little aside: I did not wear shorts for 8 years. He LOVED TO HUMP MY ANKLES! I sleep in long pajamas, lived in jeans, put on socks. Now, that was fine until we moved to Florida LOL. I realized when shopping last week that I could start to wear shorts again around my spayed, female Samantha.