A man's got to do what a man's got to do

A man's got to do what a man's got to do.

  (humorous)
something men say when they are going to do something which may be unpleasant or which they are pretending will be unpleasant as a joke
Usage notes: From a similar line in John Steinbeck's book, Grapes of Wrath and often used in films.
I hate catching spiders. Still, a man's got to do what a man's got to do.