Alex’s cheeks burned. “I… thought they were… never mind.”

First, let's set the scene. A high school setting could work for a crush scenario. Maybe a protagonist with a crush on someone, and "peanut" could be a nickname or a symbol. The NSFW photos could be a secret the protagonist discovers or a misunderstanding. Let me think of a plot where the main character finds photos of their crush that are inappropriate, leading to a conflict.

Jamie blinked, then laughed—a warm, unguarded sound. “Oh! You saw Peanut’s ‘hottie’ pics, didn’t you? He’s just my little stress mascot. This one”—they pointed to a shot of Peanut curled in a peanut butter jar—“was for his dating profile. The shelter’s trying to find him a ‘soulmate’ Chihuahua.”