When you shove your dick so far up your partners anus you penetrate their cerebral cortex, leaving them in a drooling and incoherent state of mind (Much resembling a lobotomy)
1. I had a crazy time with Tommy last night. I swear that boy gave me an Anal Lobotomy.
2. Oh shit bro! I need to find a good place to dump a body. I think I just gave my girl friend an Anal Lobotomy