Unpopular opinion: If you want me to fuck your husband. Post him too. If you want to fuck my partner, then you can just post you. Also take me on your vacations, I deserve it.
Dynamics are always hottest when there is some sort of difference or taboo between the quean and the cake. Body type, being insinside the general friendgroup, income, language, dom/sub/switch, race, openness vs secrecy, etc.