What do i do about my cat? he's misbehaving?

ok, so its gona sound kind of mean and dirty, but it works, i live with parents and we had cats all my life, and of course u get some of the misbehaved ones, so what u have to do is pretty much grab him the way mother cat grabs her kittens, that upper part of neck and stick his nose in whatever he dose like pee and poop, if he throwed up intentionally that would work too, but u do that when u know it wasintentionallyl, for example he knows to go to the bathroom to go to the litter box to do his business but the door locked, then it would b ur fault not old his, but if the door was open and he still goes somewhere else to pee try the method i told you, when we heard about it and my dad tried it always worked on our cats even though its mean, and dont worry even if he is sensitive he'll still love u and come back for ur attention, its just something even their catMommyy does when she teaches them to go to litter box, hope it will work for you kitty so u wont have to give him away