1 part Complete MatureIt means that you trust your partner enough to just let go
Harry didn't know Louis. But he felt closer to him than he ever did with any ex. He felt safe in his arms, that Louis would drop everything to the floor, just to take care of Harry. He felt loved by the way Louis's blue eyes whispered to his own. He knew that he was safe.
OR the Porn Star AU where Harry hasn't partnered with someone since his ex and Louis slowly helps Harry let down his walls.