This happened 9 years ago. I was texting with my female coursemate. I wanted to say “After I ate the medicine, I felt a bit itchy”. But I wrongly spelled “itchy” as “ecchi”. And I didnt know that is the wrong spelling until many years after. And I actually repeatedly use this word to her..such as my hand ecchi, leg ecchi, etc. No wonder she didn’t treat me the same anymore. And till now I still haven’t clear up the misunderstanding.