What Is the Hosts' Big Objection in the Jim Stirling Chapter?

The Second Client, Jim Stirling, keeps Belinda in the maze with the American prospect. Alice Levine's main objection is not a plot hole. It is that the men are wearing thongs. She asks when that became acceptable, and whether anyone actually knows a man who wears one. James Cooper says a G-string is a different garment, and that this is not happening among people he knows. The hosts have been listening to Rocky's descriptions of Jim and the other clients, and the thong is the detail they will not pass. They also say the chapter shows how much more explicit Rocky has become since the opening of Belinda Blinked.