“[T]he logical conclusion to the ‘human potential’ argument [against abortion] is that we potentially deprive a human soul of the gift of existence every time we fail to seize any opportunity for sexual intercourse. Every refusal of any offer of copulation by a fertile individual is, by this dopey ‘pro-life’ logic, tantamount to the murder of a potential child! Even resisting rape could be represented as murdering a potential baby …” (Richard Dawkins, The God Delusion, p300)
He goes on to remind us of Michael Palin singing “Every sperm is sacred” in Monty Python’s The Meaning of Life.