n.繃緊；拉緊；緊固
May try to build with a leg on his shoulder, buttocks' extension causes feminine vagina muscle tautness, therefore the vagina stricts, has overcome the vagina too loose question. 可以試著用一腿搭在他的肩上，臀部的伸展使女性的陰道肌肉拉緊，因此陰道變窄，克服了陰道太松的問題。
