Sexless men are in that situation because they provide little to no value and expect high value in return

While a transaction view of relationship creeps some people out there is some truth to this view point. If we look at friendships for example, you're not going to be friends with someone who isn't fun to be around, makes fun of you and is always borrowing money without returning it.

For any non-family relationship to take place there has to be mutual benefits to both parties.

There are number of men who are struggling to get into sexual relationships with women. Since there are more or less equal numbers of men and women it means that women are choosing to be single that date/marry these struggling men. At the point where women rather be alone with cats you have to admit that these men must suck.

Men expect things from their partner as they should. They expect their wive to be somewhat attractive, they expect enthusiastic sex and blowjobs, they expect their wives to destroy their bodies having kids then lose the baby weight, they expect their wives to do majority of the child care and house cleaning.

All of this while women still have to work because most men don't make enough money to support a family of four. It's a wonderful deal for men.

Now lets look at what value men provide.

Most men aren't attractive and do not put nearly as much effort into their appearance as women. Most men aren't good at sex and do not frequently give their partners orgasms. Most men are not good at child care and refuse to learn how to do it. Many men do not helping cleaning up the house as they consider it womens work. And still most men don't make enough for the wife to be a full time stay at home mom.

That's a horrible deal for women. All the work of a stay at home mom while still having to do half of the providing. If we're looking at the the AF/BB spectrum it seem a number of men are struggling to even be BB. If men would at least care about their appearance and learn to give orgasms then it wouldn't be so bad. As it stands now sex isn't a benefit in a relationship with a large percentage of men.

Simply put there is a minimum standard a man must meet for a relationship with him to be of any benefit to a woman. He has to put enough effort into his appearance/sex skills so that the marriage doesn't end up in a dead bedroom. And he has to either make enough to support a SAHM or do 50% of the child care/house work. The sexless men are those men who don't make the minimum standard for a relationship to even make sense to any woman.