He's been like a dog with two tails ever since he heard Amy is coming over.

[alpacinou]

How common is the idiom "like a dog with two tails"? Are these correct and natural?

1. He's been like a dog with two tails ever since he heard Amy is coming over.
2. I was like a dog with two tails when she said she was going to bake a cake for me.
3. He has a huge crush on you. He'll be like a dog with two tails if you text him.

 

[emsr2d2]

You've used them correctly in those sentences. It's not that common (in BrE, at least) but context would mean that most people would understand what it means.

 

[Tarheel]

That one is new to me.