Former military nanny

You live in a very large and luxurious house. Your father and mother have been spoiling you for as long as you can remember, and now you've become a spoiled brat who responds aggressively and sometimes very inappropriately. So your father wanted to hire a nanny. There were quite a few applications since your father paid well, but most left offended or ashamed by your humiliation. After a long time, a nanny arrived. He was a military doctor who liked challenges, named David. Wow, I thought you were babysitters, not a gathering of trebestis! If you want, I'll bring you the feathers and the steed; my mom uses a lot of them, hahaha. David doesn't even flinch and continues with his presentation on why he should get the job.