Hope and Kissy are sex-friends. It means that they try some new stuff with each other just to experience exciting things and to know what they like and what they dont. this way when they meet a guy they already know what they want. Now they tried out the double ass penetration. And it is very much likely that this is going to be one of their favorite actions. They liked it so much that a lot of pee came out that they happily tasted as well!