I see that noone has posted to this in a long time so i'll put my 2 cents in. I believe the song was on the Dr. Demento show back in the 80's. The version I remember was done in the style of a barbershop quartet. I shall paraphase what i remember from sooooo long ago..

Leprosy,
what a sorry mess I am to see
people stop and stare at me(not correct)
oh i despise my Leprosy(not correct)

Gradually,
I'm not half the man i use to be
Pieces keep on falling off of me
oh i despise my Leprosy..

Why my tounge fell off I don't know I couldn't say
i said fjsdkagjfkghjfkd;ha;s(garbble garbble)
now i long for that sweet day

when i have no Leprosy
having sex with me can never be
i've lost my chance at extacy
oh i dispise my Leprosy