According to David Quinn (Comment, May 6), the royal wedding was a "tremendous advertisement for marriage". It was no such thing. It was a wedding and weddings and marriages are two different things.
If their marriage is a long-lasting, reasonably happy affair where they approach whatever problems they encounter as a team and never go to bed on an argument, then it can be considered worthy of holding up as an example of the benefits of matrimony.
Howth, Co Dublin