One of the ‘fits that made a splash—quite literally—were the bikinis, with fans trying to figure out just how long Lucy wore hers for, and we have the answer.

“People don’t think we’re shooting this for over two days, and they’re in the pool for 12 hours, and they’re getting out and in, so, you really have to have at least five of every bathing suit, so that they’re not walking around with wet bathing suits all the time if they don’t have to be,” Svenson says, adding that bathing suits, for that reason, are often source new. In this case, they came from ASOS and Triangl, respectively. She paired them with Lucy’s skirt, which “came at the umpteenth hour,” was sourced from Etsy from Ukraine, while Pippa’s was from Miss Sixty.

And, now, if you were wondering why Lucy did not change out of her bathing suit in the following scenes, the mastermind beind it is one person and one person only: Grace Van Patten.

“Grace was the one [to suggest her not changing],” Svenson says. “In my costume designer brain and then the brain of the showrunner, she showers and then goes over to Alex’s house. So, in my mind, she was not in the bathing suit. But that morning that we shot it, Grace was like, ‘Okay, hear me out. What if she never takes off the bathing suit?’ And it’s, again, dipping our toe into what we did season 2 [when she doesn’t change her underwear between seeing Stephen and Leo].”

“Grace is such a genius. Honestly, all of her thoughts about her character are so well presented, and she really takes this character to a different level,” she adds. “I think this was a moment that she was really able to speak up and be like, ‘This is what I know about the character.’”

10. Everyone’s a goth at heart