Affection absolutely.
If someone was treating me badly I'm not going to feel affection towards them so I wouldn't be forcing myself to show it. And likewise if I was being horrible I wouldn't expect someone to show me affection.
The lack of affection shows that something is wrong, not necessarily with the relationship, it could be an issue with one of the people such as depression..
But for some reason some people think a lack of affection is a behavioural problem or something that a person is doing wrong, instead of understanding that it's to do with their feelings most of the time.
Sulking/silent treatment etc, well I think sometimes that is normal after a row but there is a line and some people do it deliberately in order to control their partner so that's a separate issue. Some people have very poor communication skills and are very fond of stonewalling. I personally think those people shouldn't be in relationships until they sort their issues out because it can feel like torture to their partners.
But not feeling affection or having sexual desire for their partner is something that can happen even among those who are highly sexual and very affectionate people.
I find it odd that you can't recognise any expectations of sex within a marriage, when at its core that's what marriage/cohabitation is: an exclusive sexual relationship.
I see it as expectation in a marriage, but you seem to use the word in a different way and you seem to mean entitlement.
For me I would see expectation as the dictionary definition -
a strong belief that something will happen or be the case.
So there can be loads of expectations in a marriage, people can have a 'strong belief that something will happen or be the case' such as sex, affection, love, being on the same team, kindness, loving words, support etc....doesn't mean that they actually get it though does it?
In a marriage I assume that sex will be part of it. So then if it isn't then that means that there is either something wrong with the relationship, or something wrong physically or mentally with my partner. The lack of sex is a symptom of something else, rather than a behavioural issue or something that the partner is doing wrong.
If something is wrong with the relationship or something is wrong physically or mentally with my partner then I understand that sex might not happen. I'm then not going to expect it and I'm certainly not going to feel entitled to it.
You seem to believe that no matter what state the marriage is or what issues there are that there's an entitlement to sex.
I would never ever in a million years want a partner to have sex with me if they didn't want to. I couldn't think of anything worse or anything less sexy. If I couldn't deal with the lack of sex and whatever issues that were causing it and if they didn't seem fixable then I would end the relationship rather than try to make them have sex with me when they didn't want to. That's just gross to me....and it should be gross to everyone but apparently not.
It does seem common though that people that 'expect' sex from their partner when they don't want it, are rarely happy with the sex that their partner does reluctantly have with them because it is of course lacking enthusiasm seeing as they don't actually want it. So this attitude that people should have sex if they don't want it because their spouse expects it doesn't tend to fix the issue anyway.