"I will tell you that he is the most difficult person in the world to buy a present for. He is a man! They are hopeless!... He likes to make a list of things that he wants so you get it exactly right. I find this time of year impossible as it’s his birthday and then it’s Christmas, so you have got two in a row. Everybody else is easy but he is not." British royal Camilla, Duchess Of Cornwall insists her husband Prince Charles is the most difficult person to buy a gift for, as he turns 65 on Thursday (14Nov13).