Common sense?

Isn't it common sense that guys are mentaly younger and more childish than the girls in the same age?
Today, waiting at the busstop, three guys passed me. I think they were the same age as I....
One of them were reaching down to his groin, inside his jeans, with a wide smile on his lips (finally figured out he got one? :P)
I didn't look that way much longer but I heard something like: "This game is harder..."

Guys... grow up! ;)

Thank god for guys a bit older! :D