I think there are a million reasons that have been posted on this site against keeping corns together. They are singular creatures in the wild (except at mating time of course), and they get stressed when sharing a viv. There's the danger of disease being passed easily with two in one viv, and the possibility of not knowing which one regurged if you have that happen. There are others of course, who leave theirs in tanks together and they do just fine. I wouldn't chance it though. Two males could fight potentially, and a male and female might mate. If the female's too young, you run the risk off egg retention, and death, or at the least retarding her growth as she has to produce eggs.