Hi
I've got two males living happily together and they are not related. I got them at seperate times and therefore had to introduce them very carefully.
We had the two cages next to each other and then every so often, we swapped the bedding from one cage into the other. When we put them together, we put them in a new cage so neither of them felt territorial about it. They got a long fine for a little while and then the newest one reached maturity. They started to chase and get aggressive so we split them up again.
They were only split up for a little while and then we put them back together and they've been fine ever since

Good luck - it can work but you have to be prepared to watch them carefully and introduce them slowly.