Lobsters were on sale this weekend for $5.99/lb and I decided to make lobster fra diavolo. The recipe called for dispatching the lobsters and then separating the claws and tail section from the body. I asked the man working at the fish counter if he could do "the deed" for me. He said he couldn't and told me that when the lobster is killed it secretes a substance that would be toxic if the whole lobster isn't cooked right away. I've never heard or read this before. Is there any truth to his explanation? By the way, he did offer to separate the claws/tail from the body for me, which he said would be safe and which, in hindsight, I should have had him do.