(Man) Masturbating the shaft or softly tugging or cupping the balls, or using your fingers to put some pressure on his perineum, that area between his balls and anus, can send him over the edge.
同时套弄阴茎或是轻扯蛋蛋 或是用手指在会阴处 即睾丸和肛门中间的部分按压