She thinks she might be an exhibitionist

"Okay, I trust you." Futaba said. "I trust that what I say here won't leave this room, right?" Akira nodded with a look of concern on his face. Futaba took a deep breath and finally said it.

"I think I might be ab exhibitionist."

Akira stared at her with his usual blank expression for bit before it suddenly morphed into surprise as he took a step back.

"L-listen, listen!" Futaba quickly said. "Last...sort of...awakened something in me. Every time I was naked outside, I felt a sort of...excitement. I tried to ignore it at first, but I just couldn't." Futaba wasn't only talking to him, she was talking to herself as well in a sense. She was finally accepting it. "This is the only explanation I can think of, and the more I think of it...the more exciting it sounds." She glanced down at her crotch when she said it, and saw Akira's eyes follow for a second. "Just, listen." she continued. "I need to test this just to be sure, but I'm not completely sure...how." She looked him in the eyes and finally spoke the question. "Will you help me?"

Once again, there was a few moments of silence before he finally reacted once again with surprise.

"H-how would I even help?" he asked.

"I...I don't know." she admitted. "Like, help me figure out if I actually am one, and help me come up with ways to "test" it. Maybe be a lookout for me in case someone may find out what I'm doing? You're a good liar." Akira cringed, and Futaba quickly tried to take it back. "I-I mean it in a good way! Just, please help me." Akira took his head in his hand and mumbled to himself for a few seconds before he looked back up at her.

"Alright. I'll do whatever you need me to do." he said. She blushed and smiled. "So, what are we gonna do, then?" he asked. Her smile fell, and it was her turn to think.

How could they test if she was actually an exhibitionist?