Messages of love will be exchanged around the world today, but instead of penning a romantic message in a card, many people will chose to send a saucy text to their valentine.
Sexting is so popular in the digital age that a recent survey found 80% of people have received a racy text message.
The poll by Phones 4u, the mobile phone store, found 40% of those they questioned went on to have sex with the sender.
And because today is also National Condom Day, the shop is giving out free Bones 4u condoms to make sure people are safe when sexts lead to sex.
Russell Braterman, managing director of Phones 4u, said: "Sexting is becoming a modern way of life in today's society.
"With so many people being self-conscious about expressing themselves sexually, using their mobile phones to sext is an easy way for them to
convey themselves without being shy.
"The limited edition Bones 4u condoms will act to encourage people to enjoy sexting, and where it leads, safely."
Pollsters found 76% of people would rather send a saucy text than make a dirty phone call because it feels more anonymous and 44% have sent a naked picture of themselves to a lover.
Phones 4u are running a competition on its Facebook page for the chance to win a gift set including a video camera, hair straighteners and a set of pink and black handsets. For more information visit www.facebook.com/phones4u.
The Bones 4u condoms will be available at the Phones 4u stores on Oxford Street and Tottenham Court Road in London's West End.
532 took part in the online survey this month.