性欲跟食欲一样是人类的本能，讳言性的问题并不能使性欲消失，正如不谈吃的问题并不能使人肚子不饿一样。
姿势是指伴侣在进行性交时的姿势。理论上而言，应该有数不清的姿势，但事实上，多数不同的姿势都是由大约六、七种的基本姿势演变而来的。有人认为：只有男在上的性姿势才是唯一正常，并可接受的性交姿势；也有人宣称，应该有很多不同变化的性姿势，而且除非能够精通所有的性姿势，否则就不足以称为是一个合格的伴侣。这类的传闻更进一步地指出，肢体困难度愈高的性姿势，愈能带来高度的性满足感。这些都是不实的传闻，没有任何一种姿势具有特别的效果，而能力应由伴侣所感到的满足感而定，而不是由一个人对变化所知多寡来决定。
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