Now, I know this is politically incorrect, but it's pretty funny. I found it on the Telecaster discussion page, but I imagine it's been circulating for some time. I apologize ahead of time to anyone offended by it. But it is funny.

Schizophrenia - Do You Hear What I Hear?

Multiple Personality Disorder - We Three Queens Disoriented Are

Amnesia - I Don't Know if I'll Be Home for Christmas

Narcissistic - Hark the Herald Angels Sing About Me

Manic - Deck the Halls and Walls and House and Lawn and Street and
Stores and Office and Town and Cars and Buses and Trucks and Trees and
Fire Hydrants

Paranoid - Santa Claus is Coming to Get Me

Borderline Personality Disorder - Thoughts of Roasting on an Open Fire

Personality Disorder - You Better Watch Out, I'm Gonna Cry, I'm Gonna
Pout, Maybe I'll Tell You Why

Obsessive Compulsive Disorder - Jingle Bells, Jingle Bells, Jingle
Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle
Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle
Bells, Jingle Bells, Jingle Bells, Jingle Bells ...

Agoraphobia - I Heard the Bells on Christmas Day but Couldn't Leave My
House

Senile Dementia - Walking in a Winter Wonderland Miles from My House in
My Slippers and Robe

Oppositional Defiance Disorder - I Saw Mommy Kissing Santa Claus So I
Burned Down the House

Social Anxiety Disorder - Have Yourself a Merry Little Christmas While
I Sit Here and Hyperventilate