"She cups and lifts her buttocks with her palms, spreads wide her thighs, and digs in her heels besides her hips, while you caress her breasts."
Love Teachings of Kama Sutra, by Vatsyayana, translated by Indra Sinha
This position is particularly desirable if the woman has a small yoni and the man has a large lingam. Also, because the woman is on top she can select exactly the right depth, speed and angle of penetration, giving maximum stimulation to her G-Spot, which can bring about deep vaginal or ejaculatory orgasms.
