Similes are addictive, like Werther’s Originals. Or like crystal meth. Yes, it all depends on the simile one chooses. This week Lord Carey of Clifton, a former Archbishop of Canterbury, wrote in The Mail on Sunday that the three-parent baby procedure debated in the Lords was “like an organ transplant”. He omitted to say it was like an organ transplant in which the donor was alive until the organ was removed.I do not want to be emotional about this but the procedure seems to me like feeding a baby with another baby. As Dr Helen Watt, from the Anscombe Bioethics Centre in Oxford, noted in a letter to The Daily Telegraph, the standard “Newcastle procedure combines parts from a healthy donor embryo with parts from the embryo of the woman who wants a baby. Two embryos a