If you can trigger the Lazarus reflex in a dead person, why not the orgasm reflex?

Source: "10 Things You Didn't Know About Orgasm." TED2009. Feb. 2009. Conference Presentation. Additional Information: This quote by author Mary Roach is from her 2009 TED Talk in which she presents interesting facts about orgasm. In this quote, Roach asks, if you can trigger a spinal reflex in a brain-dead person causing them to raise and cross their arms (the Lazarus reflex), can you also trigger a "beating-heart cadaver" to have an orgasm? Roach says she posed this question to an expert on the matter and found out that the answer is yes, if the sacral nerve is sufficiently stimulated. Watch the full TED Talk here: Mary Roach - 10 Things You Didn't Know About Orgasm