Shang Qinghua waves a hand. "It's kind of both? It's like a mutual loss of interest. You know, the shine wears off. Of course they're all gagging for his dick all the time, but Binghe's whole thing is that he has superficial connections with dozens of women, but no one truly knows him. You know, he doesn't actually let anyone in. So of course over time his wives are going to get a little disillusioned. They all think they're going to be the one to save him, not realizing he's past saving." This is all standard brooding male lead stuff.