Oban is 11 years old, intact. He nearly got the snip at age 8 due to an enlarged prostate but with Holistic medicine the prostate shrank back down and neuter was cancelled. We do get bad attention from a few, only a very few, neutered males. There is literature you can read about the effects of soaring testosterone on other dogs, mostly male dogs, at puberty but I have found none, except forums like this, on nasty attention once the testosterone levels have subsided in your dog. Here's a link on the testosterone at puberty and the second one is to our "sticky" here on this forum on the pros and cons of neuter.
See Puppy License to Misbehave, the whole article is good though.
Ch 7: Dog Behavior
Neuter/Spay - Pros, Cons, Risks, Benefits - Research Article Links