Kourtney Kardashian surprised her mother Kris Jenner and partner Corey Gamble with a two-week celibacy challenge, which Corey found especially difficult. The Kardashians live in a pretty no-holds barred household. In the public eye since many of them were just children, they’ve learned to have a certain openness with each other and the general public. In the final season of Keeping Up With The Kardashians, chatter gets down to all things physical between mother Kris and daughter Kourtney. Ooh Err. But Kourtney surprises her mom with an unusual challenge. Kourt introduces celibacy challengeIn s…