姑娘多美不适合流泪少年多酷不合适抽烟
[gū niáng duō mĕi bù shì hé liú lèi shăo nián duō kù bù hé shì chōu yān]
These lines juxtapose femininity with sadness and masculinity with toughness. It laments that girls are too beautiful to cry and boys are too cool for unhealthy habits like smoking, implying one should maintain positive and health-affirming traits rather than engage in negative ones.