Chen Guan was somewhat speechless; Yun Bihua was indeed quite bold.
Chen Guan didn't find any issue with Yun Bihua's way of doing things. What's wrong with people pursuing what they like?
People like that live a colorful life, don't need to care about others' opinions, and it's perfectly fine to make themselves happy.
It's just that Chen Guan's pursuits weren't like that, and he even felt it would be a bit too troublesome, because such a person might like one thing today and another tomorrow. If something displeases her, she might turn away to find something or someone else that makes her happy. While she might be happy, others might not be.
Chen Guan didn't have the energy to engage in romance, nor did he have the time to manage a relationship carefully, so he preferred more stable relationships. Ideally, there would be mutual benefits; that would be even better.