If that is her only problem with the relationship then she should be happy. It's so superficial and even childish!!!! A hairy chest? Tell her to go out with a gorilla and leave you alone. It's just a way to manipulate you and make you feel inferior and deficient as a lover and man. Buy a bad wig and use double sided tape then put it on your chest. If she laughs and realizes how ridiculous she is then you have made your point. Thye point is that you will not let her take away your masculinity. It's my opinion that this is more of a game and has nothing to do with your chest hair. Maybe she doesn't realize she is in this power play and she's not playing fair. She knew this when she married you and now it's an issue. I say bullshit!!!! Watch out for her, she has another agenda. This is some picky nonsense. She knows it's not possible that all of a sudden you can grow hair on your chest. She has made you feel less manly and she knows it. Take a deep breath hold it in and let it go to your balls and be a man. She is telling you subconsciously that she questions your manhood. Maybe I'm looking into it too deeply but that is so superficial that there has to be a deeper or reason. Or maybe she is that superficial and it's time to rethink your relationship.