We should indeed treat one another with tolerance and treat everybody’s sexuality with understanding, but the fundamental question we are deciding today is whether English law should declare for the first time that two people of the same sex can marry.
Parliament is sovereign—we can vote for what we want—but we must be very careful that law and reality do not conflict. In 1648, the Earl of Pembroke, in seeking to make the point that Parliament is sovereign, said that Parliament can do anything but make a man a woman or a woman a man. Of course, in 2004, we did exactly that with the Gender Recognition Act. We are now proposing to make equally stark changes to the essence of marriage. During the civil partnership debates, I was given solemn assurances on the Floor of the House, including by some sitting on the Opposition Benches now, that the Civil Partnership Act would not lead to full same-sex marriage.