http://www.youtube.com/watch?v=BJ2veDOC0RI

Above is a link to the Best of Friends bits from YouTube. There is a clip in there that has Joey and Chandler making fun of Ross for dating someone who is younger. The six friends have typically been dating people their own age (in their mid to late 20s). Ross decided to date one of his students and he is ridiculed by the other five over it. They act as though in history, it would be ridiculous for a man to date a much younger woman. Joey and Chandler make comments about her immaturity, playing with Barbies, or saying she is 13. Later in the clips, she actually proves the two men right after she and Ross break up. Ross is commenting in his head that it was a healthy break up and she was really mature about it. Then she throws water balloons at Ross. Women who date older men do not always act that immature as the director portrays.