Although Su Qing has always liked mature women, actually encountering one makes him feel quite uncomfortable.
The older women he's met before are like Li Zijun, who would hit him over the head, and Liu Shuzhu, who wouldn't let him graduate—neither of whom were easy to deal with. One he didn't dare to pursue at all, not even a thought about it, and the other almost got him expelled. So now, although he's still into mature women, he keeps his distance, and as for fooling around, he gives that up.
Older women aren't easy to fool... not easy to please!
That's why when he faced Shen Yi, he always remained a bit cautious, especially since she looked every bit like a financially successful cougar.
