“Some people are oil and water.”
“Some things just aren't meant to go together. Things like oil and water. Orange juice and toothpaste.”
“Watching them was like watching water and oil do the impossible.”
“Love and magic are like oil and water--they just don't mix.”
“Pritkin and Mircea mixed like oil and water, only not so well.”
“And oil's not supposed to mix with water. But then someone invented mayonnaise, and wham - instant mixing.”