Harry works in a coffee shop and has been single for a bit too long, Louis is a dentist with a love for scones and espresso.
If Harry had know what Louis job was he'd probably never had been that nice.
"What are you doing?"
"Putting my tongue in your mouth, what the hell does it look like?"
Or the one were Harry and Louis have a special job. Louis can't stand Harry. He most definitely does not fall in love with him.