The more Susan waited, the more the doorbell didn't ring. Or the phone. - Douglas Adams

Time,” said Arthur weakly, “is not currently one of my problems.

And then, just when you think that you have experienced all the wonders that this world has to offer, you round a peak and suddenly think you're doing the whole thing over again, but this time on drugs.

One of the major difficulties Trillian experienced in her relationship with Zaphod was learning to distinguish between him pretending to be stupid just to get people off their guard, pretending to be stupid because he couldn't be bothered to think and wanted someone else to do it for him, pretending to be outrageously stupid to hide the fact that he actually didn’t understand what was going on, and really being genuinely stupid. He was renowned for being amazingly clever and quite clearly was so — but not all the time, which obviously worried him, hence, the act. He preferred people to be puzzled rather than contemptuous.