Go here to learn.
http://www.stumbleupon.com/su/1uWdAU/www.13.waisays.com/clitoral.htm/r:f

Here’s my take. This still confirms that the best female orgasms come from the mind. Oxytocin is a “Molecule of emotion” and the more you can help her produce, the better the orgasm. Clitoral orgasm setup helps you help her mind to produce more, as explained in the above article.