少年脚踏两只船你不怕翻吗
[shăo nián jiăo tà liăng zhĭ chuán nĭ bù pà fān ma]
The name suggests that someone is dating two people at the same time which might be risky or dangerous, just like trying to row a boat with two oars on one side would likely tip over the boat. The expression conveys some warning against such behavior.