Nearly a third of commuters work in bed, a study has shown.
A similar number of people admit to checking their phones as soon as they wake up - before kissing their partner good morning, the report showed.
According to the data, one in five people who take their work to bed spend 14 hours a week on their laptops or phones while tucked up.
Some 15% tap away at computers or smartphones at the same time as their partner.
The majority (75%) of those who work in bed (29% of commuters) spend more than 30 minutes doing so each day - amounting to at least three-and-a-half hours a week.
The study, commissioned by information security trade show Infosecurity Europe, showed nearly a quarter of these people spend more than two hours a day working under a duvet - amounting to an extra 14 hours a week.
Claire Sellick, event director of Infosecurity Europe, said: "The smartphone has had a massive impact on the way we behave and these figures reveal that it has even had an impact on our behaviour in the bedroom.
"However, another key issue that is highlighted is just how dependent we are on our smartphones - in both our personal and professional lives. It is therefore increasingly important these devices are heavily protected to ensure any data stored on them does not fall into the wrong hands."
Some 1,000 commuters in London were consulted for the survey last month. Infosecurity Europe 2013 begins in London on April 23 and will showcase new products and services.