初恋是不能触碰的禁忌
[chū liàn shì bù néng chù pèng de jìn jì]
First love is seen as a pure and sacred memory. The phrase suggests that the sweetness and bitterness of first love should not be revisited or disturbed for it always stirs up complex emotions including nostalgia, shyness, and perhaps pain. It's a special part of life that remains sealed in one's deepest memories.