I was once young and uneducated on this subject as well. I was attacked on a pet forum for my views and that only made me resist harder.

It is true that the aggression may pop up in future years and that neutering them would prevent this. If they meet other dogs problems are less likely to crop up if they are neutered. Another good behavioral plus to neutering is that they are less likely to lift a leg on your couch and wander from home to find a mate. If there is a female who comes into heat in the area you can bet that if they get the chance to run they will go for it. That is a danger to your dog.

If they mate with a strange female they could get diseases from this. Also on the health aspect of it is the prevention of testicular cancer. That strikes me as something no pet owner wants to try to handle so the best answer is neutering.

It also helps control the massive amounts of unwanted animals. There are so many pets out there without homes, why chance adding more. I know this sounds like a lame reason because it is hard to visualize but imagine that your male mates with a female and each of the puppies remains intact and mates, it can add up pretty quick.

Believe me I understand the hesitation. You sound a lot like I did about ten years ago. I now have all my pets neutered and it has helped them all so much more than hurt them. Please do some research online and I think you will find this being the best option for everyone involved.