What with the popularity of the male pregnancy plot device in Kyou Kara Maoh! fic, I started thinking about ways and means that could actually work in the context of the series.
Six hours later, I had an essay on Mazoku reproduction. However, I haven't seen all of the series, and much of the rest of what I remember I do not remember really distinctly.
If anyone would care to look at my essay and tell me whether I have anything in it that flat-out contradicts canon, I would be grateful.
KKM Mazoku Reproduction: Possibilities