make someone's mouth water

往事不用再提

馋得流口水

The delicacies on the table make him mouth water
桌上的美味佳肴馋得他直流口水。

Dialogue :   
Sue: Wow! What a gracious table! Everything looks so beautiful.
Bob: This might be the best dinner you've ever had.  
Sue: Surely it is. I can hardly wait. They make my mouth water.
Bob: I feel itching, too. Let's start and try these delicacies.