Ok, we'll tell you if it's crap. Just don't take it personally. There's plenty more to life than writing these stories.
A warning: First-time contributors usually neglect the editing required to make a story work. They are liable to be punished, perhaps even humiliated, in the reviews. (This is a BDSM site after all! ;-)
Hope it's not too late to say... Try to avoid:
1. "Standing back to admire his handiwork."
2. Starting a story with "I woke up and found that I couldn't move my hands, it was dark, I was blindfolded, and there was something in my mouth, like a rubber ball."
3. 1st to 2nd person. "And then You did this to me." (Some people enjoy this style, it infuriates most others)
4. Watch out for the stuff the spell checker misses: there/thier/they're, where/were/wear,its/it's and your/you're.
5. (My current pet hate) if the story has finished, then make the last paragraph read like it is a last paragraph and in any case write "The End". If the story has other parts then make that clear too.