Sex is domestic labor? Shit, I thought it was two people being in love enjoying each other's company.
The idea that because a man earns money and has a stay at home wife means he is entitled to sex? Ewe, sounds like legalized prostitution, and a bad lover. Seriously, if you have to pay a woman, straight up cash of financial security for sex, you're probably not a very good romantic or lover.
I think more of a woman trading the domestic labor, cleaning, cooking, child-rearing so that they can save 120k+ yearly on daycare, cleaning services, and cooking from home instead of eating out while the other spouse is able to pay housing, food, and other costs. It's a partnership, if anything the work is exchanged for other work.
sex should happen because people love each other, not as some financial contract. Just, ewe.