Here's  my "unexpected" Girl Guides lesson:
In May 2010, Girl Guides Canada celebrates its 100 year anniversary.
A rally was to be held at Ontario Place.  
One evening in March, I heard about this rally, and surprised that my daughter had not brought home a permission slip,  I asked a leader if they were planning to attend. I was told that there were not sufficient leaders, based on the required ratio for the rally. 
Not wanting the troop to miss out, I immediately volunteered my wife and I. Full credit to local leadership: plans were drawn up, a bus chartered, and permission forms sent home with the girls. 
As few days before the rally, a leader came to the house to speak with my wife. She explained that while my volunteerism was to be commended, unfortunately, I could not attend: district GCG council was looking over the final arrangements, and vetoed my participation because I was a male. 

The CGC does not  hold the moral high ground on this or any other issue.