Arm

• An Arm is a human limb - technically the part of the superior limb between the shoulder and the elbow but commonly used to refer to the whole superior limb.

• The average number of arms that humans have is slightly less than two. The reason for this is that, while most human beings have exactly two arms, a few have one or no arms. This reduces the average across all human beings. Assuming that the number of extra arms collected by arms collecters is outnumbered by arms missing, of course. If you'd like to push the average up, see your local surgeon, serial killer, mannequin manufacturer, or arms dealer for tips on how to acquire more arms.

• Bear arms or paws were kept for good luck in the 18th century in North America. The back legs were cursed. Hence the second amendment:

• A well regulated militia being necessary to the security of a free State, the right of the People to keep bear arms, shall not be infringed.