One in five men use partner's fingerprint to unlock phone while they are asleep

Four in 10 people confessed to spying on their other half's phone at least once a week. [Photo: Courtesy]

One in five men wait until their partner is asleep to use their fingerprint to unlock their phone, a study has revealed.

More than a third of Brits have admitted to snooping on their partner's devices and social media accounts to find out whether they are guilty of cheating.