There's a reason whyKendall Jenner and Harry Styles' joint appearance on The Late Late Show went so swimmingly. 

The singer filled in for James Corden as a guest host on Tuesday's episode, during which he and the Keeping Up With the Kardashians star played Spill Your Guts or Fill Your Guts. During the segment, Kendall agreed to rank her siblings according to their parenting skills, while Harry opted to consume cod sperm rather than answer her question of which songs on his last album are about her.