Skulls are an okay thing to draw as long as you don't do it often.
Here's what it says:
"Sometimes when I look at someone, all I see is their skull. Their bony skull on top of their fleshy neck. Then I cant unsee the skulls, I see them on everyone. When I appear to be looking into their eyes, really I'm staring into their black eyeless sockets. I feel like I have uncovered an incredible secret. And I don’t know whether to laugh about it or to be afraid."