其实是因为这一类会麻木人体感知，并使人病理性地不断重复一个动作，表面上看是性能力提高了，实际上双方的体验都会大幅度下降。顺便说一句，印度神油其实也相当于一种轻微的麻醉剂，因为快感被抑制，所以才拉长了时间。
In fact, it is because of this kind of numbing human perception and the rational repetition of one action, which appears to have improved sexual ability, that both sides actually experience a significant decline. By the way, Indian goblins are a slight anesthetic, and that is why it takes a long time for pleasure to be suppressed.