Nothing really to teach- some strains will do it; some won't. This was only a partial surprise to me actually.
The Donkey Dick I suspect shows sex under 24/0 because of its Mighty Mite heritage, not the skunk side of its background. Mighty Mite is a strain that is kinda on the edge of what can be considered an autoflower. She will flower with less than 18 hours of light, instead of less than 12.