“If it looks like a duck, quacks like a duck, it's a duck!”
“If it looks like a duck and quacks likes a duck, it's a duck, right?”
“On the outside, the man of today is carefully groomed, perhaps unnecessarily and over carefully clean; while inside he is dirtier than the dirtiest animal—whose anus is as clean as its mouth, provided said animal has not been "domesticated" by "civilized" man.”
“You ever hear that expression 'If it looks like a duck and it quacks like a duck, it's probably a duck'?”
“If it looks like a duck and sounds like a duck, it could be a really ugly swan.”