It is testament to Guppy's anger at the moment that he hasn't gone bright red at this criticism of his penis. But the hot rage has passed into pure, cold anger.

"What now Miss Mars? Do we stoop even further into childhood and go from immature penis jokes to name-calling?"

He sits down, pours her a cup of tea and passes it over, his expression keeping its coldness.

"If we are going to discuss this then let it be in a civilised manor, rather than this petty sniping. What is it that you wish to achieve?"