Normality enchantment

"Look at this, 'Mione," murmured Harry, after a few minutes of browsing. His nude lover hurried to his side, to take a look at the book in his hands.

"A normality enchantment?!" read Hermione. "Cast this spell on yourself to make any sexually motivated action or trait ordinary to the minds of any onlookers. Strengthening the charm will cause those who later hear about those actions or traits to also accept it as normal. Depending on the strength of the witch or wizard, normality can persist for up to three and one ninth hours."

"Ever been turned on by exhibitionism, 'Mione?" teased the Boy Who Lived.

"I'm not sure this would count as exhibitionism, Harry," she replied matter-of-factly. "Personally, I'd describe it as -"

"Do you want to do it or not?" he interrupted with a laugh.

Hermione looked back to the tome, and Harry saw her chest rising and falling as her eyes darted across the page. "Yeah. Yeah, I do." She was almost breathless with excitement.

Both brimming with anticipation, they followed the instructions for the spell. It only required that the target be highly aroused when the incantation is made, which for Harry was difficult to prevent with Hermione Granger naked next to him.

The brightest witch of their age waved her wand. "Normalitatis aeternum," she pronounced, and Harry suddenly had the sensation of cool water running over his skin, starting at the crown of his head and finishing at the tips of his toes.

"Any ideas how to test it out?" asked Harry, smiling knowingly at his lover.

"A few," grinned Hermione.