Pornstar:

Lisa Ann’s professor husband is away at a conference, and he’s asked his graduate student and teaching assistant Kyle Mason to check in on her while he’s away. When Kyle shows up, he catches Lisa poolside wearing far less than expected, but he’s even more stunned by her cool, worldly, and seductive demeanor. A completely unfazed Lisa leads Kyle inside and directs him to the living room, where he nervously waits as she goes to change. Upon her return, an overt seduction begins, which proves to Kyle that no higher education can supplant the value of real life experience.