Beemers or Mercs?

I know it's April 7 today, but it could be April 1! A headline in New Scientist said 'male monkeys prefer boys' toys.' This came from Kim Wallen, a psychologist at Yerkes National Primate Research Center in Atlanta, Georgia. So Dr Wallen, ahem... how d'you know that then?

Did the monkeys tell you they actually preferred the dumper trucks over the Barbies? Or was it the fact the wheeled toys could move on their own? Can we say the female monkeys have 'monkeyboy' tendencies? Whoops, I'm getting carried away. Dr Wallen himself even cautions against over-interpreting the results.

Consequently, I have two questions: the first is "So what?" Who cares whether male monkeys prefer boys' toys?

And for fear of being seen as anti-research, anti-psychologist, or whatever, my second question is: did the male monkeys prefer beemers or mercs?