Let's go to the text: "Finally, I note that he describes the title of my book as “obscene,” and complains that it attacks someone who is “elderly.” Would he ca

Let's go to the text: "Finally, I note that he describes the title of my book as “obscene,” and complains that it attacks someone who is “elderly.” Would he care to say where the obscenity lies?" Hitchens doesn't deny that there is a sexual connotation. Regardless, sexual connotation is not synonymous with obscenity. The point is that he invites Leys to discuss whether the title is obscene or not. (He doesn't explicitly deny the claim of obscenity, you'll note.) This discussion would further Hitchens's goal of discussing religious wfigures with less reverence. p.s. I'm not the one downvoting you, if it matters.