Clinical practice and data show that each generation maintains fewer relationships than the previous one. The reasons that point to are multiple; from the influence of technology to job insecurity, housing or feminism.

"It's been happening for four decades," says José Díaz, the president of the Spanish Association of Clinical Sexology. "The realities are different, and the quality and quantity of information in the world is unbalanced," says Eusebio Rubio-Aurioles, from the World Association for Sexual Health.