The not-so funny castratoThe folks at Language Log routinely complain about how bad the science reporting at the BBC is, pointing to several cases of over-generalisations, bad summaries, misinterpretations and so on (an example). I found one such case myself, where this news article, headlined "Humour 'comes from testosterone'" and subtitled "Men are naturally more comedic than women because of the male hormone testosterone, an expert claims.
Reading the article, it seems that the "expert"'s method was to cycle around the streets of Newcastle upon Tyne on a unicycle and document reactions from people. Based on his observations that most of the men recorded made snide comments, while the women were kinder. Without even getting into the merits of this approach, I'd like to point that hardly do smart-alec comments translate fully into "humour", in its wide and varied forms. Does this take the 'expert' all the way in explaining away why males have more of a tendency towards humour? There is certainly no excuse for the assertive tone of the headline.
BTW, I must say that in my own small (perhaps non-representative) world, my experience has been that males are more likely to indulge in language-oriented verbal humour. I have observed female participants in this activity, but the numbers have been considerably tilted the way of the gender with the testosterone. But I would hardly venture a theory of aggression to explain this, which is perhaps why I'm not quoted in the science pages of the BBC!
(A cursory search reveals a lot of interesting links on the subject)