Scientists have finally got a grip on our deepest sexual desires - by looking at what people type into Google。

The findings have been published in a book called A Billion Wicked Thoughts, co-authored by Ogi Ogas and Sai Gaddam. They have examined one billion online sex-related searches from around the world to find out what users click on when no one else is looking。

Among the findings are the fact straight men prefer heavier women to thinner ones and find feet erotic. They also enjoy a wide variety of erotic images, including both elderly women and transsexuals。

Meanwhile straight women enjoy reading about and watching romances between two men, but only when the focus is on emotion and not sex。

Gay men and straight men were found to have the same favourite body parts, which in order are chests, buttocks then feet。

Information from the search also found men fantasise about group sex more than women, and picture more men than women in the action。

Straight men prefer to watch amateur porn online and domination and submission is popular among straight women and gay men. Gay men also enjoy watching straight porn. Experts think because porn is so readily available on the internet it may be helping human desire evolve as billions of men and women log-on more and more。

However, Donald Symons, an evolutionary psychologist in United States, thinks the survey does not necessarily prove people find the images arousing and they may just be searching out of curiosity. Others point out that there is no way of knowing what motivated any of the searches。

通过调查人们在谷歌搜索框里输入了什么关键词，科学家终于窥到了人们深埋在内心的种种性欲望。

这些新发现刊载于一本叫《10亿个邪恶想法》的书中，由Ogi Ogas和Sai Gaddam合著。为了了解网民私底下都会搜些什么内容，他们在世界范围内检查了10亿条与性有关的搜索内容。

在众多发现中，研究人员了解到直男更喜欢较为丰满的女生而非苗条者，而且直男会觉得女生的脚很性感。直男们还喜欢看各种挑逗性图片，甚至连老女人及变性人都不放过。

而“直女”则喜欢阅读或者观看两个男人之间的浪漫故事，但该浪漫只涉及感情，跟性无关。

研究人员发现，男性不论弯直，他们喜欢的身体部位都是一样的，按照喜好程度排序是胸、臀，最后是脚。

检查搜索内容得到的信息还显示，比起女人，男人更容易幻想群交，且在幻想中男人比女人多。

直男更喜欢在线观看业余色情表演。而“攻”与“受”在直女和弯男中很流行。弯男也喜欢看男女色情作品。专家认为，由于容易接触到网路色情作品，随着成千上万男女越来越多地上网，人们的欲望得以助长。

但是美国进化心理学家Donald Symons认为，该调查并不一定就说明了人们是在有意寻找挑逗性的图片，他们或许只是出于好奇。其他学者指出，该调查无法得知这些搜索内容背后的动机是什么。