In my youth, these young men are laudable in my memory.

 1. One time I lost my wallet and ID card on the train. Two days later, I received a package with my wallet, ID, and a letter from him: he found my wallet on the train, he introduced himself, his height, job, and family members' jobs.

2. When I was studying at night school at the university, a day student left a note in our drawer wrote: " I was watching you outside the classroom at night."

   3. One summer, I worked in an ice cream shop for a month, and a boy came here to eat ice cream every day.

I have no idea who posted my profile on a dating app. I got a lot of emails in the last year. Lots of them knew their intentions clearly, not by implication.  

However The Mixxer site is suitable for me to learn the language and my purpose.