I only expect them to look good and have sex with me. Is that so unrealistic?
No, but you're a single case. I'm talking collectively.
In my sociology class, at one point in the year the class would separate the men and the women and have each write out exactly what they'd want in the opposite sex, and my teacher has said the same exact thing happens every single time with every single class every single year: the men list a bunch of very exact physical characteristics, while the women list a bunch of personality traits. Ultimately, my teacher put it like this, "the guys want a porn star and the girls want a character from a romantic comedy."
I've also been reading discussions about gender issues on a related basis, and they echo this same thing. It seems men are socialized to want an attractive woman with little emotional needs and high physical needs, while women are socialized to want a funny, nice, helpful, but confident and self-sufficient man who is faithful, satisfied by their affection, and is devoid of insecurity. It's not like people like this don't exist, but they're a minority.
But what keeps coming out in the discussions eventually is that these are bad expectations to have as men and women are not all too different at the core. Sure, there are some differences in brain anatomy, but they're far less deterministic than culture. If brain anatomy determined gender roles, then gender roles of all cultures in history would be the exact same.