Actually I've only experienced one clutch that had retained sperm, all of the other ones were on purpose. I'd say out of twenty clutches I'll get two that will give me a who's your daddy clutch. What's interesting is that I don't always see multiple morphs, as an example the two that I've seen so far this season have been from gold blush super mojaves bred to a gold blush crystal. Those clutches should have produced crystals and super mojos, but instead I ended up with crystals, super mojaves and mojaves.
Brian