i have to say that this is one of the few skills i am truly proud to have. though i have little knowledge as to how i gained this awesome power, i use it on a daily basis.
as a young child i always marveled at the intricate acrobatics pens/pencils would perform at the fingertips of other people (this was a childhood want akin to that of whistling and yo-yo mastery, two skills i would still like to master). however, after much dedication and several hours practice during my free time, that skill magically appeared at my fingertips. true, at first i couldn't do that many twirls before having to reset, but i have steadily improved, and consider myself to be quite proficient nowadays. and even today, years after i first picked up this skill, i am filled with the warm feeling of accomplishment every time i perform this feat.
with the awesome skill of pen twirling, i was assured to never be bored again whenever a thin cylinder shaped object laid nearby. whether it be the boredom that comes only with standardized testing or the wait for food at a chinese restaurant (though be wary of asking for more than 2 pairs of replacement chopsticks, people might start to get pissed off), twirling keeps my idle hands busy.
pen twirling, itself, is quite an expansive field. there is a variety styles, so you can mix it up a bit with a switch from twirling between index and middle fingers to a twirl on a thumb or to threading through the fingers. and just a word to the wise, i would recommend using a pen for practice instead of a pencil because pens are usually balanced nicer and pencils often get damaged too easily from the falls (what with the lead and all).
pen twirling is not for everyone; it requires a good deal of maintenance and dedication. so be prepared to sacrifice if you truly want to learn this art. i encourage all to practice continually until they have at least a working knowledge of pen twirling and can feel the joy and happiness that i feel each and every time i twirl a pen.