Anna Boltas, 17, experienced her father being told there wasn't enough blood available for more transfusions to keep him alive when he suffered from bladder cancer. "My sister and I offered to give him the necessary blood, but we were told that donations don't work that way," she explains. So, she decided to donate everything: platelets, blood, and plasma. In 2019, Carlos González had a headache. It didn't seem like anything that couldn't be cured with ibuprofen, but he began to feel a strange heartbeat, and in the emergency room, he discovered he had an arteriovenous malformation in his brain that needed surgery. During the 18-hour operation, 36 bags of donated blood were used. "My 14-year-old daughter doesn't tell me she wants to be of age to go out and party, but rather to donate blood," he boasts.

Maria Sellés (Barcelona, 1990) is one of the founders of the Association of Daughters and Sons of Donors, whose goals include ending the anonymity of gamete donors, which is protected by law, so that those born from these donations—like Sellés—have the option of knowing their genetic origins. Her mother told her from a young age that she was born through artificial insemination, "without the euphemisms that some families use," and she had always had questions about who her biological father was. Until adolescence. "When I realized that I couldn't know who my father was, I stopped asking."