We weren't sure what to make of this online Flash sex simulator until we clicked on the unmarked rectangle in the upper right corner of the screen: by following the instructions and using the controls which appear after you follow the "continue" link, you can configure this animated couple in just about any position and velocity you can imagine.

Instant Karma DIY (Flash - via Sensible Erection)
The Flash file is also available here - if anyone knows the original source or creator, please let us know so we can give credit where credit is due.

Update: The page containing the original file and copyright details is here: Instant Karma (thezutons.net - thanks "Anon".)