"Co-Ed Confidential" must be considered unique in the sense that it is one of the few pornos where the writers actually put effort into writing the screenplay. Normally, porn directors and writers simply hire several attractive girls, pay them to have sex with less attractive males (of course, you really need a bisexual to make an accurate determination on that point) and arrange for boring dialogue in between. The assumption, of course, is that the porno will be profitable, because of the graphic sex scenes.
But like "Dream On" (another series that comes to mind which is similar to the one reviewed here), this series is witty, amusing and original. For instance, I like the scene where Lisa (Sandra Luesse) tries to join a nunnery to safeguard her virginity. The joke here is an inside one because the head nun is played by a porn star well known in the 1990s. Another scene at the end has Karen's father remarking on how innocent and virtuous his daughter is -- he really has no idea that she is sexually uninhibited. And even the banter that occurs between the characters can be really interesting.
However, I do fault the series for a few things. Some of the sexual humor is base and the sex scenes can sometimes be quite boring. Most of the actors are average, which is not surprising since it is hard to find good actors in the porn industry. But Kevin Patrick, as James, really steals the show as the cool guy running the frathouse. He successfully portrays a character that is amusing, interesting and bit too clever for his own good.