You should look up the bestiality laws in his area and then send him a copy of it! if the laws are prohibitive, tell him where he can seek help. If the laws are permissive or non-existing, tell him you've posted his ways all over the Internet on a chicken discussion forum!!
I mean...WHAT IN THE WORLD other reason could there be for his logic?! I don't usually laugh AT people, but I can't hold this one in!
Hi logic was this: roo gets on female; female lays egg which passes through and is coated by the rooster juice. No, really- he 'splained it to me.