Sometimes you’re watching a talk show and you’re like, how did Jimmy Kimmel know that both of his guests, Brie Larson and Kevin Hart, recently had food poisoning on their separate family vacations in Cancun and knew to ask them about it? Did it just come up beforehand? Were their publicists like, Jimmy, PLEASE ask about the vacay if there’s time? Were the guests SELECTED because of what they have in common, i.e. the recent food poisoning? Stuff like that happens all the time, like on James Corden’s The Late Late Show Wednesday night, when viewers found out that pop star Meghan Trainor and The Shape of Water director Guillermo Del Toro both had and love pet rats. I’m still wrapping my head around it.

I didn’t grow up with pets, but a pet rat would have been a huge no-no in my house, so maybe this is hard for me to comprehend. But as Trainor explains to a similarly baffled Corden, she loved her childhood pet rat, an albino named Lulu. Lulu was super smart, says Trainor, and would come if you called her name and was treated to her leftover egg yolks every morning (which Trainor didn’t eat). But it all came to an end when Trainor was brushing her teeth one morning, wearing Ugg boots. “I stomped on my mine on accident,” she tells del Toro.

Still, Trainor gives you the sense that Lulu was really loved and cared for while she was live, and anyway, rats only live about two years—on that fact, Trainor and Del Toro readily agreed. (Del Toro also revealed that his latest pet rat was the one that Jared Leto gave to co-star Margot Robbie on the set of his movie Suicide Squad, which is about as happy of an ending as that story can have.)

Watch the video above.