What does it mean for girls to send scarves to boys?

Scarves give people a warm feeling. Girls give scarves to boys to express their true love for boys.

In the past, when a girl fell in love with a boy, she would secretly buy wool and knit a scarf for the boy at night. At this time, the girl made up her mind to show her love to the boy, which was a bold show of love.

Nowadays, many girls may not be able to knit their own scarves. Even if they buy scarves, their meaning hasn't changed, which means they should say to boys: No matter what happens, I love you. Generally, boys will be very moved when they receive girls' scarves, and their relationship may quickly heat up and become close lovers.