Baltar,
It was about vaccinations. Same concept though.
"..much looseness of our day along sexual lines may be traceable to the easy and continual violation of the divine commands to keep human and animal blood apart from each other. With cells of foreign blood racing through his veins a man is not normal, not himself, but lacks the poise and balance which makes for self control." (Golden Age, Feb. 4, 1931, p. 293)AJWRB