Vanity of Vanities

Out on a long drive yesterday, I was stopped at a traffic light near a grey Volkswagen Beetle (the "especially old" kind now, I suppose) with a personalised license plate. I read "PUTITINH" and started trying to sound through it, and then after a second or two I remembered the Simpsons episode where Homer is trying to replace the family cars and he gets the advice "Put it in H!" while test-driving a car from a country that "no longer exists." I do sort of wish my camera was at hand to record and prove it, but the sighting does amuse me. Could there be something "dubious" to getting a license plate like that? Perhaps, but understanding it when you see it seems to relieve you of any chance of feeling superior.