i wopuldnt say never house males together that is a little extreme. considering i have housed male corns together for over 5 years and nothing has happened to them. they always stay in the same hide box, and everything else together. i dont believe in housing hatchlings together cause of cannibilism, but once they are feeding you bet i got two to a tank.
p.s. i also keep two corn in a 110 gallon tank as well.