I have the basic plot conflict down- teacher arrives at school to find out she's been nominated to get messy on stage, and oh whoops, they don't have enough ponchos so her outfit gets trashed.
Wasn't planning on doing a sex scene.
I remember one story from that old wam story site and it ends with a dunk tank model getting repeatedly dunked by a hot guy and at the end he's like hey you look really hot in that soaking wet gown here's my number. And then she goes home and realizes that she's into this kind of stuff.
I usually just write, 'The End'.........l.o.l. Sorry, couldn't resist....
When you're writin' a story, think about 3 things: The beginning, the middle, and the end. How do your people meet-up? What are they wearing? What pushes the story forward? Does it become sexual, or just 'for fun'? Think about all the books, movies, T.V. shows that you've read or watched. How were they plotted out? And there are plenty of books out there devoted to how to write....
And writin' a story takes a lot of time....proof reading, re-writing, etc.
I'm sorta' stuck myself with the 'Scott & Billy' stories. I usually have things pretty much 'plotted' out when I start writing. I was gonna' end it where they just become boyfriends who just like the whole 'WAM' thing, but was encouraged to continue with the boys and their 'adventures...'. Guess I will continue with 'em for a bit when I get the chance.
Anyways, if you enjoy writing and you think you have a good idea, go ahead and have fun with it!