Julian the Sphinx

During the rest of the tour your mind keeps wandering back to that beautiful sphinx girl and her very suggestive riddle. At the end of the tour the clerk turns around and says "Well, any of the girls catch your fancy?" "I was thinking about adopting Julian" you reply. "Good choice" the clerk says, "She was beginning to wonder if she would ever be chosen". When you reach the door that she had been "guarding" she l looks at you and says "if you want to get through again your going to need to answer another riddle" you look at her and say "actually I have a riddle for you" "well isn't that interesting" Julian says "alright let's hear it" you smile at her and begin your riddle, "What is it each pet here wants but only you will get? " as she thinks you put the collar around her neck. Shocked all she can say is "thank you".