Comic Book Couple --- Image by © John Richardson/Illustration Works/Corbis
A vintage illustration of a couple embracing --- Image by © ImageZoo/Corbis
Save Us! --- Image by © John Richardson/Illustration Works/Corbis
Husband kissing concerned wife --- Image by © Ikon Images/Corbis
Frustrated businesswoman worrying in thought bubble --- Image by © Jacquie Boyd/Ikon Images/Corbis
Close-up of couple --- Image by © Jacquie Boyd/Ikon Images/Corbis
Women friends having drink in bar --- Image by © Jaquie Boyd/Ikon Images/Corbis
Frowning woman holding cell phone --- Image by © Jacquie Boyd/Ikon Images/Corbis
Woman in nightgown climbing up stairs flirting speech bubble --- Image by © Jacquie Boyd/Ikon Images/Corbis
Close up of woman's frustrated face --- Image by © Jacquie Boyd/Ikon Images/Corbis
Anxious woman worrying about diet in thought bubble --- Image by © Jacquie Boyd/Ikon Images/Corbis
Worried couple looking at bills --- Image by © Jacquie Boyd/Ikon Images/Corbis
London, England, UK --- Retro couple sightseeing in London --- Image by © Jacquie Boyd/Ikon Images/Corbis
Woman with thought bubble getting caught in the act eating slice of chocolate cake --- Image by © Jacquie Boyd/Ikon Images/Corbis
Close up of young couple kissing --- Image by © Jacquie Boyd/Ikon Images/Corbis
Close up of face of worried man --- Image by © Jacquie Boyd/Ikon Images/Corbis
Close up of couple kissing and content woman thinking in thought bubble of holiday romance --- Image by © Jacquie Boyd/Ikon Images/Corbis
Comic Strip Girl --- Image by © John Richardson/Illustration Works/Corbis
Comic Headache --- Image by © John Richardson/Illustration Works/Corbis
Couple hugging --- Image by © Ikon Images/Corbis
Comic Strip Touching Hands --- Image by © John Richardson/Illustration Works/Corbis
A vintage illustration of a couple sightseeing --- Image by © ImageZoo/Corbis
Dentist talking on telephone --- Image by © Ikon Images/Corbis
Beautiful, blonde woman thinking about fun --- Image by © Ikon Images/Corbis
Excited woman laying in bed thinking in thought bubble --- Image by © Jacquie Boyd/Ikon Images/Corbis
Close-up of frustrated woman --- Image by © Jacquie Boyd/Ikon Images/Corbis
Close up of beautiful distraught woman --- Image by © Jacquie Boyd/Ikon Images/Corbis
Couple kissing under umbrella man thinking in thought bubble oblivious of rain --- Image by © Jacquie Boyd/Ikon Images/Corbis
Man talking with speech bubble giving girlfriend necklace gift and fastening it --- Image by © Jacquie Boyd/Ikon Images/Corbis
Woman scheming in speech bubble --- Image by © Jacquie Boyd/Ikon Images/Corbis
Seductive smiling woman talking in speech bubble --- Image by © Jacquie Boyd/Ikon Images/Corbis
Close up of happy woman hugging man --- Image by © Jacquie Boyd/Ikon Images/Corbis
Close up of woman talking on telephone --- Image by © Jacquie Boyd/Ikon Images/Corbis
Close up of pleased woman kissing man and thinking in thought --- Image by © Jacquie Boyd/Ikon Images/Corbis
Close up cartoon of nude couple hugging with content woman thinking in thought bubble of holiday and romance --- Image by © Jacquie Boyd/Ikon Images/Corbis
Woman in bikini lying on beach with book --- Image by © Jacquie Boyd/Ikon Images/Corbis
Woman talking on phone in telephone box asking in speech bubble not to be cut off --- Image by © Jacquie Boyd/Ikon Images/Corbis
Close up of 'Wow' text in speech bubble --- Image by © Jacquie Boyd/Ikon Images/Corbis
Woman in nightgown --- Image by © Ikon Images/Corbis
Tired woman laying on table --- Image by © Ikon Images/Corbis