While there are a few that engage in marital prostitution, I think that's the exception rather than the rule. There IS, IMHO, a strong correlation between male "status" and attractiveness. Despite all the talk about "trophy" wives, women do like "trophy" husbands as well.
I think that women like to have a guy they can admire, and who will inspire envy among their female friends, and thus increase her status among her friends. It's generally a combination of wealth, social status, wit, and attractiveness, with different women assigning different weights to each factor
Couldn't you consider "marital prostitution" be done by any woman who marries a man who brings home the bread while she stays home and doesn't work? Ha ha!
We men want a woman who will give us a bath, wash our clothes, be our chosen prostitute, and be a child care provider to the children, and make good meals!
I think that is absolutely correct.