The mind-body problem, i.e. the relationship of the mind to the body, is commonly seen as the central issue in philosophy of mind. Dualism and monism are the two major schools of thought that attempt to resolve the mind-body problem.
Substance Dualists argue that the mind is an independently existing substance, whereas Property Dualists maintain that the mind is a group of independent properties that emerge from, and cannot be reduced to the brain.
I think the suggestion here is that mind and body are not ontologically distinct kinds of entities hence the allusion to a "man with two brains".
The past was yours, but the future's mine

His brain, and the one in the jar.
The English will not be pushed around much longer

It's a send up of the old B-movie science fiction, and "horror" titles. It is not literal, but the fact that he is a brain surgeon. And deals with brains all day.
otiskariya, your explanation is probably the best. Prior to this movie, there were many movies with "The Man With[**]" in the title - some of which were schlocky sci-fi movies. Do a search here on IMDb and you will see what I mean. Note that there is a 1972 B-movie called "The Thing With Two Heads," aka "The Man With Two Heads," and another one from 1963 called "The Man with the X-Ray Eyes."
Dr. Hfuhruhurr (or whatever his name was) was a brain surgeon dealing with extra brains in jars, and they wanted to spoof old sci-fi movies, so, it probably wasn't a huge stretch for the writers to come up with the name "The Man with Two Brains." Even somebody with half a brain could have done that.

"Nice beaver!"
"Thank you, I just had it stuffed."
The Naked Gun: From the Files of Police Squad!

It's a send up of the old B-movie science fiction, and "horror" titles. It is not literal, but the fact that he is a brain surgeon. And deals with brains all day. And yes the scrotum does look like a tightened brain.
I was adjusting your breasts. You fainted and they fell all out of whack.

No, I'm pretty sure the simple answer is that everyone has a brain, but he happens to also have one in a jar. For fu cks sake people! How do you imbeciles manage to put your damned clothes on without help?

Or he is torn between thinking with his big head and his little head. the scrotum can be referred to as a brain because of the way it looks when contracted.
The simplest answer is that the writers were doing an awful lot of cocaine.

There are two brains. The one of his wife (Kathleen Turner) and the one he is in love with (Sissy Spacek). He is a man with two brains (both of the women he loves, one body one mind).

Actually 'bowfinger' is also another term used to describe the V-sign or "two-fingered salute". And of course the two brains are Anne's and his own.

Yea main characters brain and the brain in the jar. Hmmm this is one of my favourite comedies

Bowfinger is his (last) name

The title is just more "jerk" humor. He doesn't have 2 brains. It's a mild case of false advertisement. That in of it's self was supposed to be funny. Ha.
Imagine handing the script over to the producers and the main character has an unpronounceable name. More jerk humor. They had to take it because "the jerk" did so well.
To me this movie isn't funny. It's coke fueled retarded crap. If coke were acid, this movie wouldn't even be HEAD.

It was the main character's last name and it sounds funny. I love that movie.

I think the title is a sendup of the old 1950's B horror movie titles. But with Steve Martin, it's hard to know what to expect. I am still trying to figure out what's with the title "Bowfinger".

This isn`t quantum physics people.
Maybe not, but it
IS
brain surgery, hehehe.

You're an idiot. His brain, and the one in the jar.
The English will not be pushed around much longer

Well it parodies old sci-fi mad-scientist B-movies

what is the the parody that follows???????????

I've understood it that it was supposed to be a stupid title, to get you in the mood for the parody that follows.

Easy. Everyone has a brain. In this movie the main character also has one in a jar. Hence the man with two brains. This isn`t quantum physics people.

No, I was expecting two brains too.
Mmm, salady!

That Is my hobby, leb, - movie trivia. What's yours? "Everything you need to know about Mortal Kombat: Devastation"?
TOUT IRA BIEN

mate get a hobby.seriously

His brain and the brain in the jar.