Actually....I did let 6 months go by without saying anything. I was figuring things out. Why it happened. Getting into RP. And it wasn't until 3 months that I got very resentful and I started to detach. For me, its not nearly as much about the sex as it is the emotionless, affectionless marriage. But anyway, at this point I'm in a tough spot. I am giving her an opportunity to work things out but if it doesn't work out then I'll get divorce raped and move on. Such is life. I know with 100% certainty I will be able to spin plates on the other side.I get it and I'm onboard, trying to fix it is better than simply running out and getting a mistress. I'm sure though, that he isn't just saying something now. I'm sure he didn't let 6 months go by without approaching her about sex, bringing it up, attempting to initiate or arguing about it. When you get to the 6 month mark, that's a choice on her part, a definitive choice on her part.
A month, hey, everyone is off, busy at work, stressed, not feeling good, angry at the other person (It's not right but you could explain that away). Two, ok, someone's not happy (typical woman definition of not happy, everyone else, not so much). Three months, I'm sure there was some arguing about the topic of no sex. Four, now you're getting into the I'm done having sex with you territory. Five and six months, it's set in pretty seriously now, he's done getting sex.
You can definitely change some of these behaviors but there has to be a motivator. If you had power in the relationship, like you could take the kids or she goes penniless, you've got some negotiating power. In this modern era, you can't do either of those, so what's your bargaining chip? Loss, fear dread game? Ok, maybe but by 6 months, I'm not sure she has much interest in him anyway, so I'm sure she doesn't care much about losing him, if she's not already exploring or getting some on the side herself.
He's in a real minefield and there really isn't much he can do. A little bit of luck, stirring up some competition anxiety, defining his power at work by advancing himself, showing himself leading other men and the attention it can bring from women, I don't know, maybe but that's a big maybe.