Prince Charles planting a kiss on Princess Diana’s hand while on their honeymoon in Scotland

Prince Philip kisses Queen Elizabeth on the cheek before she boards a plane in Ottawa.

Prince Charles kisses Queen Elizabeth II’s hand after winning a polo prize in Windsor

Prince Charles and Princess Diana kissing after she presented him with a prize at polo in Cirencester

Prince Charles kisses Sarah Ferguson after a polo match in Windsor

Prince Charles and Princess Diana share a passionate kiss in Oman

Prince Charles kissing Princess Diana after she presented him with a prize at Guards Polo Club

Princess Diana kisses Prince Charles after presenting him with another polo prize

The Prince of Wales kisses Princess Diana’s hand at the end of a polo match in Cirencester

Princes Charles kisses Princess Diana while on a visit in Jaipur, India

The Prince and Princess of Wales at a Polo match in Britain

Camilla Parker-Bowles welcomes Prince Charles with a kiss to an event at Somerset House

Prince William kisses his grandmother, Queen Elizabeth II, after a polo match

Prince William greets the Duchess of Cornwall at a polo award presentation ceremony

Prince William greets his grandmother at the 10th Anniversary Memorial Service for Princess Diana

Prince Harry kisses Queen Elizabeth II after a wedding at St. George’s Chapel in Windsor

Princess Anne greets Prince Harry at the Rugby Nations Championship match in London

Prince William and Kate Middleton celebrate with a kiss after his team’s polo match win in Santa Barbara, California.

Princess Charlene and Prince Albert II of Monaco kiss outside of a party to celebrate their wedding in South Africa.

Prince Charles kisses Queen Elizabeth II’s hand on stage after the Jubilee concert at Buckingham Palace.

Princess Victoria of Sweden and her daughter Princess Estelle share a sweet moment at the Victoria Day celebrations.

Prince William kisses his son, Prince George, while on a visit to Taronga Zoo in Sydney, Australia.

Prince William kisses Prince George of Cambridge as they arrive at the hospital to visit Kate Middleton after giving birth to Princess Charlotte.

Queen Elizabeth II and Camilla, Duchess of Cornwall, greet each other at the Royal Windsor Horse Show.

Prince George gives his newborn little sister, Princess Charlotte, a sweet kiss on the forehead.

Prince Albert II of Monaco and Princess Charlene of Monaco kiss at a celebration to mark his decade on the throne.

Princess Anne kisses granddaughter Mia Tindall at a charity polo match at the Beaufort Polo Club.

King Harald of Norway kisses his wife Queen Sonja at a dinner at the Royal Palace in Oslo.

Kate Middleton and Zara Phillips greet each other with a kiss as they arrive to the Royal Ascot.

King Felipe VI of Spain kisses Queen Elizabeth II at a ceremonial welcome in London.

Prince George kisses Prince William’s hand as they board a plane at Warsaw’s Chopin Airport.

Zara Phillips and husband Mike Tindall show some PDA at the Cheltenham Festival.

Prince William and Meghan Markle greet each other as they attend an Anzac Day service at Westminster Abbey.

Prince Harry plants a kiss on his wife Meghan Markle after winning the Sentebale Polo match.