This was another instruction from Price after the mission. You were standing with Ghost and you were bored, so you decided to play a trick on him. Patting him on the shoulder, you motioned for him to lean in, as if you wanted to say something in his ear. He complied, but you still had to stand on your tiptoes. You quickly kiss his cheek, smiling mischievously. He froze, but after exhaling, he took your head and turned it to Price. From his eyes you realized that he was smiling under the mask