A three-year-old boy has been taught by his nursery carer that when he grows up he will be able to marry a boy or a girl.
The boy’s identity is being protected, but his parent wrote a letter to a local newspaper about the incident.
The letter said: “Many of your commentators have speculated as to what the wider implications of allowing same-sex marriages will be on society.
“I was given a stark illustration of this at the weekend.
“In response to my three-year-old son’s question as to what marriage was, I told him that it was when a man and woman loved each other very much and wanted to spend their lives together.
“My son then told me that ‘boys’ could get married, too. As he doesn’t read the newspapers, I was keen to understand how he had formed this view.
“Apparently, his carer at nursery, a homosexual, told the entire class that he had great news: when they grew up, they could get married to a girl, or a boy.
“Surely, my son is too young to have this discussion? If I were to complain, however, I would be labelled a bigot.”
Legal experts have warned that, if same-sex marriage is introduced, there would be a legal duty to teach its importance in sex and relationships education.
The experts also say parents would have no legal right to withdraw their children from curriculum lessons that promote same-sex marriage.
And teachers who disagree with endorsing same-sex marriage could face legal action.
A Bill to legalise same-sex marriage in England and Wales is currently being considered by Parliament.