sirius and remus were the true chaotic duo at hogwarts. like sure nobody could ever predict what james and sirius were up to. but we all know remus was the real chaotic force behind the marauders. plus, lets be real, when he was alone with james the worst thing you'd find sirius doing is like enchanting a toilet to sing opera.
but find sirus and remus alone together, and on top of the enchanted plumbing, you'd see a whole lot more of them that you'd bargained for. like honestly i don't know what the other prefects would have dreaded more. finding sirus and remus turning every suit of armor into a fluffy bunny suit, or them shagging behind said suits of armor.