Essays / Need help with Division/Classification essay discussing Types of sleepers [3]

I do not need for you to make my essay , I just want to know some types of sleepers that way I can start writing the outline.

She said write a lighthearted essay discussing types of sleepers ( she said that we can be funny, be humor). I don't know how to start and she is expecting for today an OUTLINE. ... what did she mean with types of sleepers , Did she was talking about people talking and their sleep or people who snores? or blow? o wisttle lol when they sleep or something else? how Can I classify or divided that ... ( English is my second language is for that is a little bit complicated for me) THANK YOU !!!