Risky Business &
The Girl Next Door. There's your answer.
Dont worry so much as what to write or how to start. Just start writing. When your done, start bringing it together. Adding things, changing it some maybe. Rewording things to sound better, etc etc. Dont use too many big words and make it look like you are just throwing them around to sound impressive and/or trying too hard.
And no matter what, make sure everything, 100% is spelled and punctuated correctly. It's small but big in my opinion.