Drunk as a skunk.. Are there a lot of skunks with drinking problems?
Loose as a goose.. How do we know this and is it any of our business?
Happy as a clam.. I've never known them to be jovial creatures.
There's many more but those popped in my head
"Same Difference"... What? Same difference as what?
"You catch more flies with honey..." WTF? Why the hell would I want to catch flies?
Why if we make someone laugh is it sometimes referred to as "Keeping them in stitches?" ...