While Gomez “wasn’t told a whole bunch” about 17-year-old Elena’s season 3 journey before filming, the One Day team did mention the possibility of a virginity storyline months ahead of production. “Then I was told maybe not because we didn’t know with Elena’s age,” Gomez continues. But by the time filming was in full swing, “First Time” was a sure thing. “This is something that teenagers do,” Gomez, who just celebrated her 21st birthday over the weekend , explained. “There’s definitely a way to do it safely not only physically, but mentally … It was just about making sure that we were having the conversation we all would have wanted to have before our first time.”