I hope you are not talking about housing underweight male and female ball pythons together?! Let alone housing two of the same sex...

As soon as the male is capable of producing sperm they could copulate and the female could become gravid too early, stunting her growth and causing her to slug out.

They could also try to dominate each other for the ideal hotspot in the tank.

Snakes and most reptiles are solitary and should not be housed together. In the wild, do you see two two lizards running around together holding hands? No.

As a keeper, you should try to provide the best husbandry for your animals.

NOTE: I am not trying to attack you, just trying to warn you of housing two animals together.

NOTE: If you were not even planning on keeping both togeth, sorry, but I mis understood you but this post can help other herpers who are planning on keeping two reptiles together.

Hope this helps,