In China, because of the one-child policy and late marriage and late childbirth for many years. Falling in love as a student is explicitly forbidden. If a teacher finds out that you have a girlfriend while you are underage, you will be notified of your parents or even expelled from school. In fact, there was a long time when you weren't even allowed to fall in love at the age of 3 in college. (Now because of the extremely bad to birth rate, social experts are starting to demand that underage relationships be encouraged. But this has been pointless, even high school kids are being horribly stressed by the pressure of school and life. (Tortured to lose hope for the future.)
>The Japanese anime where high school students give Valentine's Day chocolates was never a relationship fantasy for Chinese students, and school teachers absolutely did not allow it to happen.
Did you ever receive Valentine's Day chocolates when you were a student?