On the surface, “Rosemary’s Baby” is a horror film about a woman who gets taken advantage of by a satanic cult and impregnated by the Devil. In the end, it seems to be a satire on the competing entrapments of domesticity and ambition, and the boring conventionality of people who hope that opposition to convention will allow them to retrieve their lost youth. Wes & Erin discuss Roman Polanski’s 1968 classic, and why it is that Satanic evil, when confronted with life’s very frightening realities—including pregnancy itself—turns out to be so banal.