Originally posted by SmithJrBlaquaLuigiuh-again, Not funny.
They aren't being "funny" (at least I don't think so). If you were the last person alive on Earth, there wouldn't be much reason to continue, unless you want to finish some tasks to make yourself feel better, but once that's all done and all, it's like "What's even the point anymore?"
I guess you could always hope to find another person or for some alien life to suddenly visit Earth, although that's a whole another topic altogether (not to mention, unlikely).
I dunno what I would do. Probably stock up on food/learn how to make food and travel to some places. Maybe (somewhat pointlessly) note down interesting things I find on the way or maybe even try to keep a record of humanity in general, in hope someone else finds it in the distant future.
As much as I like being alone, that much time without any person is a severe problem for anyone, so chances are I would go insane way before I died.