The Gueschtunkina Ray Gun by Spencer Dryden
Alex Bennet, a first year grad student in Anthropology is recruited by a time traveler from the fifty-second century to save mankind from oblivion. His quest will require Alex to seduce the headstrong Dr.
Lilith Bendershoot, a rising star in the department and eventual founder of the movement that will lead to the emasculation of males, triggering the decline of the human race. To help in his mission, the time traveler gives Alex a secret weapon, The Gueschtunkina Ray Gun.