不是只有恋人才十指相扣
[bù shì zhĭ yŏu liàn rén cái shí zhĭ xiāng kòu]
Which means 'It's not only lovers who can interlace fingers'. The owner may feel affection beyond romance—like close friendship—deserves recognition, or they could also use this name sarcastically to address the nature or boundaries of different types of relationships.