I have 2 neutered males. Both of them were the aggressors in their relationships. (Mr. Whiskers bullied Baby, both were neutered and lived happily ever after until Baby died suddenly and unexpectedly 4 months later).
I got My Little Snuggler for Mr. Whiskers after Baby died. All was well when The Snuggler was a fuzzy baby, but when he reached adolescence, he then bullied Mr. Whiskers, so HE was neutered as well.
The two of them are currently living happily together. There has been no more dominance humping or fighting -- in fact they spend most of their time snuggled together with each other sharing recipes and baking pies!!! LOL
I hope that they, too, will live happily ever after as a couple, but you know what they say -- there will always be an emergency cage nearby just in case...
Hope this helps.
With respect to the "boy time", I think that diminishes with age, but it could be related to the fact that they are neutered.