It's more like sweet mode is "yeah, you're their wallet, but if they have to be stuck with you they want to be stuck with someone they like," whereas normal is "they put up with you for some reason after stealing all of your money." At some point you realize that the "not having sex with you" is part of the fetish. Why would Rami have a random Onahole in her purse if not just for the humiliation play of not actually losing your virginity but being tricked. She sucks your dick, showers with and kisses you but having real sex is off limits when they even have her talk about slutting around. It's just masochistic fetish fuel.