People have always wondered about Marylin on the munsters. The fact is she was a succubus. So of course she looked normal and attractive, but you notice she never had an ongoing boyfriend? Spot helped with the bodies. What did yoiu think they were feeding him?
Charming theory.
Hey you oughtta love my their agvout how a Frankenstein and a vampire had a werewolf son.
Herman was made of parts of various people , and his package belonged to a guy suffering the werewolf curse. The doctor didn't know it as he collected it after the guy had been shot with a silver bullet, died and reverted to human form.
Now Eddie was conceived on a night with a full moon when herman's package was in werewolf mode and hence Eddie.