It's a degree in Sex, not nursing or anything like that. There was info on the AIM website at one point.

It's not impressive to say the least, but ... there has been only a single HIV outbreak in porn since AIM started, and that's because T.T. Boy ignored the AIM testing system (or didn't have the intellect to grasp the need for repeated confirmed tests). That's an amazing track record. It's not necessarily Sharon's doing, but she's at least able to run AIM day-to-day well enough to attain that track record in the real world.