不，导致艾滋病的，是病毒！而病毒可以通过同性性行为传播，可以通过异性性行为传播，也完全一通过非性行为传播。

Um, no. A virus causes AIDS, and that virus can be passed along by homosexual activity, by heterosexual activity, by some activities that are not sexual at all.

这只杯子告诉我们到底发生过什么,同性性行为如何在高贵族圈子里上演。

This cup is telling us what actually went on, how homosexual activity was something which took place in high aristocratic circles.

[大自然中：动物世界的同性性行为]。

Out. In. Nature. Homosexual. Behaviour. In. The. Animal. Kingdom.

一个外国人在街上看到这广告，他笑一对在进行同性性行为的猴子怎麽促销电子琴？。

A foreigner saw this and laughed at it that how a pair of homosexual copulating monkeys would encourage customers to purchase a keyboard?

英美的一项重大研究发现了五个新的基因变异或与同性性行为有关。

A major study in the U.S. and Britain has found five new genetic variants that may be linked to same-sex sexual behavior.

许多人曾经尝试进行同性性行为，但最终他们还是坚持了他们感到最舒服的方式。

Many people may experiment with such activities, but stick to what feels best for them in the end.