7. Flashlight
The inside of the human body is a dark place indeed - who knows what lurks in its many cavities and recesses? Most people don't really want to know about such things - unless we're facing some dreadful surgery the interior of our body is pretty much a no-go zone. Not for the more curious-minded out there - for them, nothing less than a large flashlight will suffice when it comes to really getting to know their partner inside and out. Or perhaps the torch was used to help look for another random object already lost inside someone's rectum.