A former Lehman College secretary on Friday slapped her ex-boss and the school with a scathing sex-harassment lawsuit, alleging she was told to provide favors and rub his bald head.

Jennifer Wallick, 56, of Manhattan, claims the Bronx college eliminated her job last year in “retaliation” for refusing to satisfy the salacious sex drive of Robert Whittaker, 64, Lehman’s associate provost for undergraduate studies.