He is one of my old friends in San Francisco. Whenever he came to my place, he always fiddled around with everything in my room such as photo album, notebook, letters, wallet, and just to name a few. One day I thought I was totally fed up with his bad behavior. I went," Stop doing that! A proper gentleman wouldn't do that." Well, he is still my good friend until now.
If your parents liked to spy on you, you could say the phrase to them. You sure have to make them understand the words.
fiddle around with something 亂動...
be fed up with someone/something 忍受某人/某事
a proper lady/ gentleman 有教養的女士/男士
spy on someone 監視