Vamp U

Vamp U is a 2013 horror comedy about a vampire who has lost his fangs after accidentally killing the woman he loved 300 years earlier and now hides out teaching college history. Alexis Knapp plays Chris Keller, the freshman who looks exactly like his dead lover and ends up in an affair with him, which turns into a campus bloodbath once he bites her. The archive has 1 scene from the film, pulled from that affair, and it is a nude sex scene rather than a quick flash. Knapp is the only celebrity in the title, so this clip is the whole entry.