Honestly - Those boys SHOULD be neutered!
Not only are you protecting them from cancer (search for it and you'll see that having dogs spayed and neutered does protect them from getting cancer). Secondly you are going to have a handful of issues for many years to come. Neutering them will calm them down, will slow down the aggression, will help with the constant marking and humping.
It totally blows my mind when I read that ppl don't spay and neuter
