What does a skeleton costume mean to you?

He’s worn his costume every day since Halloween.  He brings it to me and then tries to put his arms in it.  Once it’s on, he bawls!  But he doesn’t want it off.  Any ideas what he wants?

Other things are clear.  The tray to the high chair means he’s hungry.  His coat means he wants to go outside.  But the skeleton costume??  He hasn’t had any candy and he went outside on Halloween but not trick-or-treating.