He had a slightly ambiguous attitude to Hastings and Poirot anyway because, you know, they live a sort of 'bachelor life', and you say, I'm not quite sure what their relationship's like when they're sort of off duty. You see them hanging around that apartment quite a lot. And there's Miss Lemon in there, the three of them, you don't really know what's happening. There might be some deep sexual thing going on for all I knew. So I thought, Japp, you know when he went round to Poirot's place, was a bit suspicious about what might go on. Decadence and upper classes, all that sort of stuff.