As Vet Street tells us, a cat drinking from a sink and ignoring its bowl might, at worst, have an undiagnosed medical problem that prompts it to gravitate towards “additional water sources.” Another, more mundane but still potentially pesky reason for kitty’s fixation with the sink might be that its own water bowl is located too close to its litter box, or in a place it finds unsafe or too noisy. Of course, it could simply be that your cat is a bit of a hipster when it comes to water, because as Inverse notes, cats have a lot of “personal preference” when it comes to their drinking habits. Kitties drinking out of sinks (and bathtubs, and whatnot) might also feel that the standing water in their own bowl is not good, or find that the material in the bowl adds a funky taste. Or, hey, maybe they just want to mess with our heads. They’re cats, after all.