Auto-correct on iPhone is really a funny thing and you can get hell lots of funny memes about it on the Internet. There is even a site dedicated to all these funny mistakes of iPhone auto-correct.
This problem is not with iPhone only. If you use your phone in T9 or Dictionary mode then you can also face the same kind of thing. For example, today I was replying an official email from my phone to the PR of a mobile phone brand. I typed "Hi Rucha" and what came on my screen was " Hi Pubic". I realised it later while proofreading which saved my day. Lol
And if you also think that iPhone auto-corrects are funny then watch this funny video below. You will love it for sure.