User blog comment:Sakuraboy91/Husband Protection Methods/@comment-25035274-20140914205615

From other mamono? They don't have to. Mamono can smell the scent of another mamono's demonic energy on a man and they just instinctively back off.

That's actually the lore as stated by Kenkou Cross, mind. Not something I'm pulling out of my ass. So, in other words, lore states mamono don't try to steal each others' men.