Do you understand?

She called me to ask whether I would come to the party. I said I would. She asked what was I doing at the moment. I said I was writing my diary.

Had I written anything about her in my diary?

Yes.

Would I bring my diary for her to see?

No.

Please?

No.

Please, give me a surprise. We are friends, aren't we?

Ha ha. See I dont share my diary with anyone.

After much effort.. she said.. ok.. I understand.

Thats what people do when they can do nothing else. They understand. Had she really understood, she wouldnt have asked for the diary, and even if asked, wouldnt have asked more than once.