NYU’s Howard Oboler presents the second in his titillating series “Sex, Cinema and Censorship” tonight at the 92nd Street Y, stripping bare the changes in Hollywood sirens over the years in “Seduction.” Oboler says, “Being 72 years old, I’m a throwback to a time when people didn’t take their clothes off to be seductive.”

Compare, perhaps, Red-Headed Woman (1932) above and the recent Hollywood effort Obsessed. Had “leggy blond temp” Ali Larter taken some tips from Red-Headed Woman lead Jean Harlow, perhaps she wouldn’t have been on the receiving end of Beyoncé’s headbutt and we would have been spared a god-awful film.

Oboler will also be examining classics Baby Face (1933), Double Indemnity (1944), From Here to Eternity (1953) and To Have and Have Not (1945), offering a crash course in how to be a good ol’ fashioned temptress. The lecture series culminates next week with “It’s a Drag.”