Responses

I think its more of him being a guy than a woman. Since its impossible for him to give birth, the spell cast on him doesn't grant him total immortality. That's why he also gave a part of his horn during the 59 years that he was gone to atleast sustain the spell. That is also why I think that he aged though not 59-year aged from the moment he met the mermaid to now.
Wait I don’t get it... he’s not immortal.. ok. Then how come he hasn’t aged for 60 years? I’m kind of confused about the explanation..