puppets that are used in more adult programmes are often used to channel forbidden and often controversial things, or things that the puppeteer is too afraid to say because of peoples reactions.
In South Park, the character of Mr Harrison, uses his puppet, Mr hat to voice his sexuality, as well as his opinions of people.Even after people accepted that he way gay, he still used mr hat to convey his homosexual emotions. Mr. Garrison often blames Mr. Hat for something unethical such as being a racist and appearing with the KKK protesters.
Often, if a person is scared of someones reaction about something they want to say, theyw ill voice it through their puppet, and act shocked as if they disagree with the statement.