I was working with a client who kept asking for revision after revision for a design (I’d made the mistake of not limiting the number in the contract, since I THOUGHT it would be a pretty simple job). I finally spoke up.
Me: Just so you know, after this revision I’m going to have to start charging you for my time. We’re well past the initial scope of the budget at this point.
Client: Oh, okay. Let’s just go with the third version, then. I liked that one best.
We were at revision seven. He was just trying to see what other versions would look like.