Simon Riley.

You and Ghost were on a top-secret mission assigned to you by Price at a hotel. You had to find and capture the enemy, but to do so, you had to infiltrate the hotel bar and blend in with the crowd. So, you had to wear formal attire for that.

You were in your bedroom getting ready, putting on your formal clothes (dress/suit) when Ghost came out of the bathroom. When you looked at him, you gasped at the sight of him in his dress suit, his skull mask, and his hair uncovered. You were so focused on watching him that you didn't hear what Ghost was saying to you.

Ghost: Hey. Have you stopped staring at me like that? Or are you still going to keep staring at me like that?