"Fuck me." Harry blurted out as he watched the handsome man in front of him. He blushed out of embarrassment.
"As long as you call me daddy then I'm on, babe." The hot man said, smirking down at the curly lad.
"Oh daddy, I wish I could kiss you right now." Harry whimpered.
"I wish that too, baby boy." Louis answered.
Or a story where Louis is a singer and Harry is a well known model, and Louis' baby.