The 'earth, swallow me' moment is when you still don't have trust with the other person. Daniela, 32, usually has quite a few throughout the month, almost all of them from flirting apps.

Núria Jorba, an expert psychologist in relationships, says the key is in naturalness. "What we have to do is normalize it. Laugh as it happens. It can happen," she says. María (35) tells us: "I finally dared to talk to my platonic love from university"