A lecture.
Two. One to get up on his high horse and another to chastise the first about oppressing horses.
Don't worry, they'll tell you.
Very, very hungry.
If she's only wearing one sock. (This joke brought to you courtesy the homeless guy outside my local 7-11.) Edit: tweaked the punchline.
Aurora boring Alice.
A hemogoblin. I came up with this during lecture after a dyslexic moment, thought someone may like it.