I Laugh At Things I Should Not Be Laughing At

You can't laugh at people when they're crying. You [b]cannot[/b] laugh at people when they're crying. I had to repeat this to myself out loud while facing a wall, as I tried to put on a serious concerned face.
I keep failing, I wish this person would just stop weeping and putting tissue up their nose because every time they do I have to turn the other way and stop myself from smiling. Ridiculous.