I feel like trying to charge a guy for "put a lizard on his penis" would make the court look more silly than anything. As is acting like that's some massive act on the same level as penetrating your dog, which is what most people assume from "zoophile." Its still wrong, regardless but anyone hearing you explain it will not take it seriously as a "crime."

Screeching about things like that helps him more than it hurts by making the charges against him sound like a joke, when he has far more real and evil things under his belt.