Cuoco also said that Cook challenges her to new thrills in life, saying that "Karl is a big adventure seeker and he encourages me to do things that are outside of my comfort zone, like mountain biking and dirt biking," which we think sounds like so much fun. "I did it, and now I'm obsessed, and I had the best time. We did it in Hawaii and, of course, now I want to be gung-ho and do it. He's getting me to be more adventurous than I am."