Fascinating! I hope to see from you a whole series of posts on this topic. IIUC this demethylation that affects paternal DNA so much is only a type of DNA modification, so we haven't even gotten to histone modification yet. If you need 1500 or 2000 words on occasion to cover more of this, I for one would be fine with that. Cheers!

I wonder if sexual asymmetry in demethylation is a mammal thing, a vertebrate thing, an animal thing — or if non-animal organisms with sexual reproduction also have the same thing happening?