Once upon a time in a galaxy far far away know as Hogwarts, Draco Malfoy was bored so he decided to go for a walk. He walked to Snape's classroom in the dungeons. He walked to Trelawney's classroom in the high tower. He walked to the Great Hall. He walked around the Hogwarts' ground. He walked far and for a long time is what I'm trying to say. He was about to go back to the Slytherin common room, where you can totally see the giant squid outside the window, when this weird blue box showed up in front of him.
This weird man wearing an awesome bow tie and a stupid fez popped out of the box.
"Oh you look like a fine companion. Dear boy, come with me," said the man.
"Who are you? Why should I come with you? What is that box thing?" asked Draco.
"Oh dear boy, I'm the Doctor and -"
"Doctor who?"
"Just the Doctor. You should come with me because you look cool and this box is the TARDIS. That's Time And Relative Dimension In Space. It's a time travelling space ship!"
"Can we go back in time to kick Potter's parents in the shins?"
"Yes we can! Geronimo!"
Draco ran into the TARDIS and they took off. They landed in Godric's Hollow in October of 1979.
"Yes, this is the Potters' house. I'll be back in a minute Doc."
Draco ran into the house and stopped suddenly. He was mesmerized by this super hot and attractive man in front of him.
"Hello, I'm James Potter. Who are you?"
"D-d-d-d-Draco M-m-m-Malfoy."
"Draco Malfoy, take off your pants and let's have sex." So they did. And nine months later Harry Potter was born. (Draco was the mpreg mom.)