Answers, anyone?

So who can explain the completely pointless spam I get? Spam without attachments or sales pitches. Spam that consists *only* of random text like the following:

They'll never find all your bones. Or maybe the mosquito mange would appearover, flapping, to a vertical dive. Then, every time, his left wing "Just don't forget to give me the order," Tender wheezed. He was allanswer "Woman" is disallowed as too obvious a rejoinder.)

The only thing I can think of is that the original attachments have been automatically cleaned up by some cunning process of Gmail or other servers. But that doesn't sound very convincing.