There are many risks that could easily be avoided by keeping them separate. Also, since you don't know the sexes, early breeding could become a bad thing for you and the female.
Males can also fight over dominance.
Cannibalism has happened rarely.
Infections such as RI's will spread much easier as well as parasitic problems, and fecal samples will be unable to determine which came from which snake.
Dominance and stress issues could put them off-feeding.

So really, there isn't a good reason to keep them together.