Okay, something I hadn't considered at first, but now here we go. Nathaniel's form of lycanthropy can be transmitted through a bite or clawing in animal form. Sex in animal form can also be a carrier. I know that one character can make another supernatural (like vampires). But since one part can be sexually transmitted, would that negate all of Nathaniel's abilities to convert people or just when having sex in animal form?
Passing on the Supernatural