[When Tony unwraps his, he'll find an elegant leather folder, and inside of the folder are several drawings that took Steve months to make, all of them on very expensive paper.
One of them depicts Steve on his knees and his hands on his back, naked except for the red-and-gold collar on his neck. Another drawing repeats this, but now adds Tony, who's sitting on a chair in one of his best suits receiving a blowjob. Yet another drawing is a close up of Steve's profile as he gives said blowjob. The next to last one has Steve's face covered in Tony's come, and the very last one has Tony caressing Steve's hair as they exchange loving looks toward each other.
Steve grows red, scratches his nose and looks aside. Because yes, this was very difficult for him to make.]