Breeding kings and milks?

Something I was wondering, was how do you breed kings and milks? I mean it's just weird that they are cannibalistic... How do you keep them together without them eating each other?

I was kind of thinking it was related to hibernation/when the time is right seasonally. Can someone fill me in? :weirdface

I cooled mine and then warmed them up after that I watched them closely when putting them together. I would put the male in by the tail end of the female. Luckily they decided in love and not war so I didn't have to separate them.