我的心是少年你随便碰的吗
[wŏ de xīn shì shăo nián nĭ suí biàn pèng de ma]
Expresses that one's heart is not easily approached or toyed with; there is an implication here that this young soul (or the feeling of youth) should be respected. There is a touch of protectiveness over one’s own emotional vulnerability.