To tell people not to cry. It's kinda this thing people have always said to try to cheer someone up, but at one point when I was crying over how happy I was, a friend of mine thought I was sad instead (I think I only told them I was crying and not why) and he told me not to cry. At that point I kinda realized, crying was something I'd done a lot whenever I was both happy or sad that helped with the emotions, so it's great to embrace it. A great thing you can do instead is just to support someone while they cry and allow them to get it out.
What's your favourite Pokemon of your least favourite type?