This is legit scary than ABO, what do you mean you would become mentally ill if you don't ...

Ngl abo to me is scarier cuz fucking or mating is almost always a requirement without suppressants on the other hand with dom/subverse yeah not being able to let out ur urges might get u sick (like how heat/ruts also make u insane) but atleast in this au dom/sub verse allows for nonsexual play. As in play that issues commands that aren't inherently sexual but still relieves the urges both parties may have like a dom will be able to feel control while subs will be able to feel controlled and praised all without the pressure of sex. Theres many alternatives or services like this that other dom/sub verse works have touched upon actually