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使用體位C時，男人的背部弓著，對喜歡陰道前壁和G點受到刺激、但又覺得後進體位不舒服的女人，是一大福音。但背部有問題的男人不宜採用這體位，而腹部緊實者用這體位可以展現自己的肌肉。阴茎插入前，如果没有备孕准备，一定要戴安全套。缓慢插入后，逐
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The movement of the bubble cloud in the direction of a membrane surface (a surgical glove) within an ultrasound subject. The membrane is positioned near the focal location on the transducer. Time in milliseconds is offered within the remaining-hand prime corner of every body.This can be 50 % that on the driving frequency of the ultrasound (15 kHz).