Faulty Logic?

Reuters reported yesterday that people over 50 (in Britain) are "grumpier."

The poll of 2,000 Britons found those over 50 laughed far less than their younger counterparts and complained far more.

The number of times one laughs/day drops from up to 300 to around 2.5 when you are over 60. Maybe the over 60s don't find life as funny any more? Or, the real reason may be in the tag paragraph to the story on Yahoo! News:

One reason for the decline in mirth might be the lack of joke-telling skills. The study found the average Briton only knows two jokes.

I for one am grateful that the people I hang around with laugh more than that.

(No wait. Maybe they're laughing at me? 

Now we need to do a survey to find out if those over 60 are more paranoid.)