It's probably swollen and red because it's taken a thrashing... given that picture is obviously from some porn.
Edit: And because I'm bored...
Atleast it doesnt rape your eyes as hard.
It looks bland that way.
For an album that aggressive (under Sabbath standards anyways), I like that the cover "rapes your eyes".
I shudder to think of what you'd think of the color scheme on the Born Again Demos bootleg.