I like it but the animation could be better and also i think the characters would look better if the would have outlines.
Heres a example how it looks like with some more work on it:
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~goldblank.swf [ 48.37 KiB | Viewed 42714 times ]
It isnt hard to make it look like that you just have to know how to do it therefor i want to show you how i did it:
This is how it looked from the begining:

- Untitled 277.png (7.36 KiB) Viewed 42714 times
I added one frame on each layer where the cock is a bit further than halfway there (You have to have the motiontween there before you add the frames)

- Untitled 278.png (7.4 KiB) Viewed 42714 times
Then i dragged those frames to the middle to make it go slow and then fast:

- Untitled 279.png (7.69 KiB) Viewed 42714 times
Now Make the last part of the tweens to frames:

- Untitled 280.png (7.66 KiB) Viewed 42714 times
And move them one frame away from the last frame:

- Untitled 282.png (7.72 KiB) Viewed 42714 times
Now do the same but for the first frame, put frames next to the first one and move them one frame:

- Untitled 283.png (7.09 KiB) Viewed 42714 times
Then you do the same in the middle, To the right:

- Untitled 284.png (7.83 KiB) Viewed 42714 times
And to the left:

- Untitled 285.png (8.27 KiB) Viewed 42714 times
So the only thing you have to do is to make one position on the first frame and an other on the 10:th frame and then copy and paste the first one on the 20:th frame and then folow these steps and your animation will be looking very good without as much pain.
I hope that helped you to make better animations in the future and also other people.