Girls eat salad!!??

We had an excercise in class today where a group of guys were asked the question "If you woke up tomorrow morning and found out you were a girl what changes would you have in you behaviour?". The girls were asked the opposite, while another group of guys was told to become forty two year olds.
Of course the guys that became girls saw some obvious things like change of dressing and things you would do in your free time or with your friends but the most outlandish one was we would eat salad!! - now where did that come from? Other changes that were argued were the type of music listened to (which some people said were more subjective than a genealization) - again the guys made a funny generalization in saying that we listened to boy-bands - unfortunately for them the two boy-bands they quoted none of the girls knew about!!
The bunch who were 42 year olds made the next set of bloopers - saying that the religion would be different because those who are free thinkers would probabaly adopt a religion because they were closer to death; females of that age wouldn't wear high heels because it is "dangerous" (causing the lecturer to examine her shoes); capping it all off by saying that they would probaly be living in an old age home - at which point the lecturer asks where they are refering to forty-two or 82 year olds!
One thing we realized were that although these stereotypes were made funny in class they have serious implications because we would tend to carry them along when dealing with others thus causing potential conflict situations.