We don't have the same expectations than in Roman Times, ergo expectations depends on what is considered reasonable by society at large.
No, expectations do not depend on society at large, nothing you say leads to that conclusion. Whether an expectation is
reasonable or unreasonable depends on what is considered reasonable by society at large*. It would be entirely unreasonable to have such an expectation, but the step towards "therefor, a person has no right to have that expectation" is a logical jump that you've not supported in any way so far. A person has the right to decide freely over what is going on in their head, you have to create a case against that.
(*And even then, that only goes so far. A reasonable expectation within a subculture for example, can be very different from a reasonable expectation in society. If I go to a swinger party, then I can reasonably expect that a person who I get in contact with is probably okay with having sex with me after we've talked for a minute, which would be unreasonable if I were having that expectation towards random people on the street.)
If I really like the look of black hair, then my expectation towards a potential partner is that he has black hair.
If my partner doesn't have black hair but I really, really like the look of black hair, then I might expect them to dye their hair black for me.
Is that a reasonable expectation? Well, most people in our society would probably not agree with it, so no, it's not very reasonable.
But I can still have that expectation of them, and if I'm lucky, they'll agree. If I'm a bit less lucky they'll offer a deal where he too expects me to do something unreasonable in return - and then I'd have to evaluate how my expectations compare to his expectations, and decide whether I want to agree or not. Or he decides to not act to meet my expectations towards him, and then I have to evaluate how much I insist on that expectation being fulfilled by my boyfriend (which means leaving him and looking for a new one if I really, really want to insist on it).
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Different example:
A guy finds out that his girlfriend is not a virgin. He expects the woman he wants to marry to not have slept with other men, so he leaves her and embarks on a journey to find a new girlfriend that meets his expectations.
What do you think should be done here?
Absolutely nothing? Then you agree that having unreasonable expectations is okay, and that expectations a person has towards another person do not need to meet societal expectations.
Expecting a behaviour from someone else is not "deciding for oneself".
I decide for myself what I value in another person, and from those decisions, I form expectations.
Your analogy sort of really reinforces my point though, right? Because as a parent you're in a position of authority over your children, and so you have expectations of your child's behavior ... sort of like how a teacher expects certain things from her students in her classroom, because of authority. But surely men don't have such an authority over women to have expectations of things?
No, you do not need authority to have expectations. I can expect my work colleagues to do all the work for me, for example. An unreasonable expectation to the point that I'll likely get fired for it because my work won't get done by anyone, but I can still ("I have the right") to have that expectation.
I feel we've sort of gotten a little off here splitting hairs .. I thought we're talking about certain attitudes where a man's expecting women to remain chaste for him, (even before knowing him!) and I really see that as a control thing. So he feels she's no good if she's had a previous partner ... but how would he feel about himself if he's been with someone before? And if he's expecting a woman he's never met to have remained chaste for him, then he's extending his expectation to all women, because he never knows who he might want to date, and so all of us need to submit to his authority and only act with his approval .. that's how such "expectations" feel to me.
Yeah, it's a stupid expectation, most people would agree with that. And obviously nobody has an obligation to act to meet his expectations. But he can still have that expectation ("he has the right to have that expectation").
I mean, I can understand something different, like if you're "expecting" your partner in your committed relationship not to be faithful, and that goes for both men and women, but I feel that's a totally different discussion. You do have legal expectations in many things, but expecting women to remain chaste for you is really going into sexism territory. As I recall this whole thing started about a man having expectations for women he's not even in a relationship with, right?
I'll repeat the example I made for Akka:
A guy finds out that his girlfriend is not a virgin. He expects the woman he wants to marry to not have slept with other men, so he leaves her and embarks on a journey to find a new girlfriend that meets his expectations.
What do you think should be done here?