nouis gay fanfiction really dirty (probably bad grammar and punctuation, written quickly) Everyone knows Louis had the best ass, and Niall wanted it....he wanted it desperately. Niall was always fond of Louis, as a friend, a bandmate, but lately he couldn't take his eyes off of him. His smooth tanned skin, his muscled arms his thick and spiked brown hair, his bright and wide smile, and his undeniably hot ass.