When using an object that requires significant pulling force, you should squeeze it between your thighs if at all possible. I find it useful and highly erotic.
When picking up girls in China, its best to ask them if they are from China, when you are in China. When they dont understand English, the effect is incredble. Game on.
When speaking to non-Americans, you must introduce yourself in a slow, drawn out manner with a volume louder than a person should normally speak. Its also best to provide a firm handshake while looking them directly in the eye. VERY powerful indeed.