Soda reminds Pony of a colt because he is handsome and enjoys attention.
When the police and reporters come, Ponyboy gets mixed up from their questions and starts to feel sick. Soda, on the other hand, seems to enjoy the attention.
I swear, sometimes he reminds me of a colt. A long-legged palomino colt that has to get his nose into everything. The reporters stared at him admiringly; I told you he looks like a movie star, and he kind of radiates. (ch 7, p. 101)
This is an interesting comparison, because earlier Pony described Soda’s infatuation with Mickey Mouse, a horse he really loved. The horse never belonged to Soda, but Soda took care of it and loved it like his own. Here, Soda is compared to a colt because he is comfortable with himself and enjoys attention. Pony says he “radiates” like a movie star, and all of the reporters admire him. Pony also admires him, because he can’t feel comfortable in his own skin.
In Chapter 7, Ponyboy, Darry, and Sodapop go to the hospital to visit Johnny and Dally. While they are in the waiting room, a group of reporters enter and begin to ask Ponyboy various questions. Ponyboy mentions that Sodapop got in on the action and kept the reporters "in stitches." Soda enjoys the attention from the reporters and cannot help but keep them entertained. Sodapop began having mock interviews with nurses and even attempted to grab a policeman's gun, which made everybody laugh. Ponyboy then comments that Sodapop reminds him of a colt that gets its nose into everything. Pony compares his brother to a colt because Sodapop's behavior is similar to that of an out-of-control young horse. Colts are known for their erratic behavior and high energy, traits Sodapop possesses. Sodapop is also unpredictable, hyper, and out of control at times, which is why his brother compares him to a colt.
pony says that because he is handsome just like a colt