As the name implies, it is the first part of the germination of human love. It can also be said that it is the first time that people have tasted "love", which is not necessarily true love. For example, if a person likes another person, he doesn't have to love her, but his love for her is unique and can't be easily replaced by others. The occurrence of first love has nothing to do with age, and both teenagers and the elderly may have first love.
First love is the first time you really accept it with your heart, so it must be the best. Everyone cherishes beautiful things, so it is normal for people to be nice to their first love!