[identify comedy with 2 guys - cross eye madness and screechy voice]

the guy is Jerry Lewis and I am willing to bet the other guy you are referring to is Dean Martin and they made several movies together.

[movie + song = bad memory..help]

Was the The Last Farewell by Roger Whitaker ever in a movie? I think I remember the melody being played while the man was walking or riding off in the sunset through tall grass.