A whole whole lot!

About 12 years ago I had a male snow corn breed with 4 females over the course of about 6 hours (without me even knowing it) and all 4 females laid good clutches.

I brought in some of my snakes for a small snake educational show a local nature center was putting on. I had my male snow, and a female normal, amel, anery, and great plains rat all in a cage together to show off some of the color options. that was the only time the females were with a male the entire year. what makes it crazier is that i was a few feet away all day and constantly pulling snakes out for people to hold and never noticed them breeding.