sitting back

In soc class ive learned a lot about people just by sitting back and watching how people interact with eachother. There are two students in this class one a male, looks japanese, and he is very knowlegable but speeks out of turn, and doesnt seem to have any sence of people skills. During class he will try to relate issues to the teachers lecture, but they dont really. It seems to annoy the teacher a little bit. Here is what i am talking about. I sit in the third seet of the second row, and around me are about five 18 or 19 year olds and two 45 year olds. The first couple of weeks were just fine... nobody really knew eachother so they didnt talk that much. But after a while these girls got antsy. They needed a common ground to talk to eachother and make the silence go away. I think it was the 45 year olds that felt most uncomfortable because they were out of place umongst all the younger adults. So whenever this guy would say something, anything, even if it was correct and useful to our lecture, they would speek under thier breath, "shut up". They would only say it loud enough for the students around them to hear. Still for some reason i was bothered by this. How could middle aged women be so immature???? The girls around me turned to them and smiled to show they understood, and from that moment it became ok for them to tease this poor man. Another thing they do more than any student ive ever met, is complain about the homework they are getting. I realize they probably havent been to school in a while and there are new ideas and concepts these days, but we all have to do this stuff. They make it sound like the end of the world just so they have something to talk about. I learned that even though a person may be 45 or older doesnt make them any more mature than a 20 year old when put in certain situations.