@spleencoffin
Well done on your successful fitness business
The male behaviour you described just made me think of a programme I used to watch. It was called 'The Secret Life of 4/5 and 6 year olds', filmed in a playgroup/school kind of setting.
There was a definite contrast in how the little boys and girls rated their ability to do things. Before setting them tasks , the boys were asked how they thought they would perform, whereupon the boys would praise their ability and, if there was to be a race, every single boy said they would win. The girls, on the other hand, all doubted themselves, except for just one little girl, who thought she would do well.
If the boys team did win, they would get a prize, make a big song and dance about it and taunt the losing team (the girls), who would look a bit disappointed.
If the girls team won, some of the boys would cry. They were inconsolable, until a little girl offered them the prize she had just won!
I found this quite remarkable.
It would appear this trait starts early in life!