Penis Fingers tend to happen when one is tired or intoxicated and cant seem to hit the right keys, or hit several extra keys all at the same time. Meaning No matter what you do your typing looks as if you typed it with your Penis.
John: whjat are yoiu up top tonight man?
Marc: Not much dude, seems like you have a case of Penis fingers tonight, lol.
John: seriouluy, I know right!?