I didn't say that children have a right to know everything. But I do believe that children have a right to know the circumstances surrounding their conception and birth. It's part of their identity. Of course if this information is sensitive it should be delivered in a well-thought out way and at the appropriate age, but keeping secrets about a child's existence creates a culture of shame which is very detrimental to the child's self-esteem. Better to deal with the issues, in consultation with professionals if necessary, and have the child love him or herself instead of feeling that they should not have existed.