Who said you couldn't have fun in the old days? Scientists have been trying to explain the preserved remains of a Pompeii victim who appears to be "knocking the top off". It appears that maybe all is not as it seems.....
When the body is affected by heat, there are many different non-natural contractions that can distort the corpse.
Anyway, who said a wank wasn't natural (apart from the Catholic Church)?
I know what I choose to believe.....