Going by a general basis of what the average little girl would have adults do if given the opportunity, he thought Diamond and Silver would bully him by stepping on his face with their feet until he gave into it, force him to wear makeup and a dress which is the highest possibility or make him do silly things as a clown of sorts to entertain them. The other would be making him play with girly dolls, but I didn't add it in the picture. However, Diamond and Tiara, although they love those ideas, are most definitely not your average little rich girls since they both possess adult intellect far surpassing that of a child's and many other adults out there so the two of them won't play with dolls........when no one is looking. By seeing this, he avoided thinking a step further in terms of them dominating him in some way. A bit scared, he waited to hear what the reason for the kidnapping was.