When the uke is treated as a mere hole for others to get off with, either willingly or unwillingly (generally the list does not include hard rape* unless explicitly stated)
Disclaimer: this is 100% unacceptable in real life, this is merely a fictional kink.
*i.e. although any sexual contact without consent is rape (doesn't matter if they enjoy themselves or not), I'm using hard rape here to mean I will not be adding any works where the uke feels only fear and no pleasure from being used.
