1. Know the person's first, middle and last name.
Although this tip may seem obvious, you would be surprised at how many people have sex with someone and are unsure whether they have a middle name, what there last name could be and whether the first name is their birth name.
2. Find out where they were born, where they currently live and where do their closest relatives live.
Let's say an emergency occurs while you are with he or she and they are unable to speak. What would you say if the police asked you, "Where does your friend live and can you g…