In several episodes, Howard seems unaware of where Pearl is, the one that seems odd to me is "The First Human Being to Ride a Hill", on two occasions Pearl was out, in one part of the episode he even checked she was not there, yet they still got a ladder out for him to climb into the bedroom, if he knew she was out, why did he not dash upstairs and attempt to grab his cycle, he would of quickly discover it was chained to the bed, there are other episodes which you may recall where a similar situation arises