The Kardashian Klan has mastered the art of sharing just enough detail to keep people interested (or confused), and Khloé Kardashian is no exception. We've been finding out more and more about the reality star thanks to her new talk show, Kocktails with Khloé​, and her ever-growing website: the wildest places she's had sex, that she once hid under her parents' bed while they had sex, that she accidentally walked in on her boyfriend's threesome (are you sensing a theme here?). Most recently, in a video posted to older sister Kourtney Kardashian's website, Khloé revealed to Kourt (and the rest of the world) how old she was when she lost her virginity.

The topic came up while Kourtney and Khloé were playing a game, which is apparently what the Kardashians do any time they get bored. It's called "Know Thy Sister," and it involves one Kardashian sister posing a personal question to the other ("What was Khloé's favorite band in high school?" "What's Kourtney's favorite Disney movie?") and trying to guess the answer while the other sister writes down the correct answer on a dry-erase board. When the timer goes off, she flips the board. 

Naturally the question of virginity came up, as in "How old was Khloé when she lost her virginity?" Khloé stayed silent but wrote down an answer, which Kourtney guessed correctly: 15. So now you can lock that bit of trivia away in your brain to be retrieved when you're trying to remember something important like your mom's birthday or your social security number. To watch the full video, including Khloé's big reveal, head to Kourtney's website.