“In crucial cases,” wrote Leon Kass in response to cloning, “repugnance is the emotional expression of deep wisdom, beyond reason’s power fully to articulate it.” What Kass calls the “wisdom of repugnance” is more popularly known as the “yuck factor”—and it pretty much captures my response to, say, Gunther von Hagens’ Body Worlds. Or the oeuvre of Michael Bay. Or, for that matter, this.