Prince William and Kate Middleton have been married for almost a decade, but it seems like the spark between them never dimmed. In fact, during their recent appearance on BBC One’s Christmas special A Berry Merry Christmas, chef Mary Berry praised the royal couple’s relationship.

The Duke and Duchess of Cambridge are known for keeping their PDAs to a bare minimum, which is why it was surprising when Mary Berry said that they were quite touchy towards each other while filming the Christmas special. Seeing their connection firsthand, the famous chef predicted that Kate Middleton will stay loyal to Prince William for life.

Prince William and Kate Middleton met each other during their university days, which means that they had a good core in their marriage, which is friendship. They were friends before they became lovers, and now they are husband and wife and parents to three young children.

Since Prince Harry and Meghan Markle are so open with PDA and Prince William and Kate Middleton are very subtle about it, royal fans wonder how should royals handle PDAs. A royal etiquette expert Myka Meier explained this curiosity.

“There is no actual etiquette or royal protocol that says the couple must refrain from PDA,” she said. “The likely reasoning is more that while traveling on a tour such as the India trip, technically the couple is working representatives of British monarchy. The couple is likely to show very little PDA, if any, to remain professional during their designated roles abroad.”

Many believe that Prince William and Kate Middleton have a stable relationship that they don’t need to show PDA just so people would think that they have a strong marriage.

One netizen took to the online forum Quora and asked, “From an outsiders perspective through what we see in the media it seems like Meghan and Harry are more in love than William and Kate, is that correct?” Royal fans then discussed this topic.

“When you are in love and secure in your relationship, you don't need to touch someone constantly,” one said. “You don't need to prove your love to the world by being overly affectionate in public. Harry and Meghan's affection feels forced. I highly doubt Meghan hangs on to Harry when they are home alone.”

Even though Prince Harry and Meghan Markle show more PDAs than Prince William and Kate Middleton, the latter pair has their share of sweet moments in public as well. The Duke and Duchess of Cambridge had always shown their affection towards each other and had been photographed kissing and canoodling.