Single post in Your Guide to 90%+ Breeding Pairs

Question with point 1, what happens if you use a Pokemon you hatched yourself? I'm trying to breed this Golett and this Ditto, the latter of which I hatched myself. They've only 46%, which I figure might happen since they're genderless and one is Ditto, but I'm not sure after reading this. I figured just 2 different OTs were fine, but do they both have to not be from you at all?