It’s not “kind of true”, they mark scent with urine. And they’ll mark all their cage mates too, and that includes their human.
But yes, rats are tiny and don’t pee on you and your house much, that’s true. They also absolutely have bladders (what a weird myth that is) and almost always potty train themselves to do most of their urinating in certain spots when not marking scent.
It’s not “kind of true”, they mark scent with urine. And they’ll mark all their cage mates too, and that includes their human.
But yes, rats are tiny and don’t pee on you and your house much, that’s true. They also absolutely have bladders (what a weird myth that is) and almost always potty train themselves to do most of their urinating in certain spots when not marking scent.