Do teacher x student really happen? Do they work?

Yeah. If the teacher is single then most of the time it works.

I recently visited an relative of mine. Her son is a school teacher who recently got married. I saw his wife and asked the relative how old the wife was..... she said she is 18 and she was his student and their marriage is a love marriage. That wife is younger than me. And i am nowhere near a relationship *sighs*