Why ancient times called the excellent heterosexual relationship "Peach Blossom Luck"

In the Book of Changes, "Woods You Mao" represents four directions of the earthly branch: due south, due north, due east and due west. When the four elephants meet, the peach blossoms will bloom, and it is best to plead at this time, so people call love "Peach Blossom Luck".

There is also a saying that the word "Peach Blossom Luck" originated from Wei Zi's game of numbers. The stage of "bathing" in Universiade and fleeting time is called "Peach Blossom Luck". There is also a saying that if there is a meridian in the eight characters, it is called "peach blossom into life."