sxp and the couple performed a live sex act as part of their presentation. the professor had warned students in advance that the optional post class section would be explicit. about 100 of his 600 students stayed to watch. >> i thought it watts extremely inappropriate. >> i don't see how it's such a big deal. >> the prior warning that was given, i don't think was strong enough to prepare all the students for that. >> when would you ever think that you would see something like this in an academic environment? >> patrick seatech is a reporter with the northwestern student paper. i'm going to add to that, too, as a parent, can you imagine a parent thinking, wow, i'm paying for this class. anyway, patrick, i want to ask about, is this the talk of the campus? and would it have been the talk of the campus if you hadn't been the first to report it and get it out there and made this a big deal? i mean, is this the norm for this class? >> sure. it's definitely been the talk in