If you think about it, theres going to be more than a little force, or trust, for the rodenian on the receving end. Eather they are forced into it, or, they are willing to take a chance and extend trust to there partner. They know very well how badly they can get fucked up if someone wants to take advantage of them.
On the other hand, think about it from the slaver point of view. Fuck the slave a bunch of times, and you got a willing, even eager slave to do what you want. Thats partly why I am working out an idea for a rodenian transformative item. Thinking of a reusable slave collar. Put it on someone, they turn into a rodenian, fuck them a buch to make them a good slave, take the collar off, put it on the next poor sob. Considering its getting a lot harder to actualy catch rodenians in the wild as it where, there colonys being armed camps, so another source of that sort of slave would be quite desireable. After all. collars can be removed, drugs can be counteracted, or sometimes just don't work. But with a rodenian, the collar is in there own head, not some thing that can be removed, and efective, can make it so that you can slip slavery/slaves right past the law, after all, the slave loves you and does what you want because you ask them to, not because your 'forcing' them to do something.