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This Site includes age-limited elements such as nudity and specific depictions of sexual activity.以各种“神油”为代表，它的作用原理是涂在龟头后起局部粘膜麻醉作用，降低外生殖器的敏感性，从而提高激发射精的刺激强度（阈值）、延长性交时间。对于阴茎皮肤、龟头粘膜过于敏感