谁没爱过一个烂货
[shéi méi ài guò yī gè làn huò]
'Who hasn't loved a rogue'? Reflecting the universality of bad relationship experience, pointing out that everyone may have fallen in love with a 'wrong' person (someone undesirable), but there's no shame nor blame since everyone goes through different phases in relationships, including making poor choices and facing heartbreak.