ok.. you seem to know what you´re talking about...
Thanks. As you can see from my avatar, I've been keeping Corns for 15 years, but many other people here are equally - and better - qualified to advise you. Some very experienced people have also answered your post here.
I´m just curious..how do corns fight? do they bite eachother?
Do you have any experiense of your own?
Yes, they will bite and they will also constrict. In youngsters, you may also get a misplaced feeding response and one snake will try to swallow the other. The one being swallowed will die from being constricted and the one doing the swallowing, is likely to die of a ruptured stomach. This is much less likely in adults, but is a risk with youngsters.
I have never kept two males together and so I cannot advise from personal experience. I would never risk doing this.
Even if they don't injure each other, the males may stress each other and the female, as others have said. There could be fighting for dominance that will lead to ongoing hostility. This can lead to ill health and sometimes refusal to feed that can result in Corns starving themselves to death.
have the possibility to keep them seperated, all three of them, but since the male and female has got along so fine with no problems at all for two years I never saw it as an opption.
I really do strongly advise you to keep the new male separately. I do keep pairs and trios of Corns together but with these basic restrictions:
1) Only one male per viv
2) Never a male and female under breeding age (3 years)
3) Never before at least 3 months of quarantine for the new snake, preferably 6 months.
There are other safety precautions, but those are the very minimum set of rules that you should be following when starting to keep Corns together.
About my new male...my plan was to keep them all together and I´ll probably try since I´ve gotten so many different answers...
I don't see that you have been given different answers. Nobody thinks that it is a good idea to keep the new male with your existing pair - please don't do it, for their sake and your own.