Sex, death, rebirth (in the sense of regeneration). Since this is opposite the 2nd house (which rules YOUR money, possessions, and values) the 8th house rules other people's money, possessions, and values, your ability to utilize the possessions of others for your own ends. By extension, it rules insurance and tax matters, as well as the influence that the values of others have on you (social values). It can also indicate what influence, if any, you can have on the values of those around you, including the society you live in. As far as sex goes, the 5th house may rule romance, but the 8th house gets down to the sex act itself, your style of sex, your tastes, what turns you on. This includes any fetish you may have. Now you see why astrology readings are confidential. By the way, if you like to play music during sex and you happen to get involved with someone who has the planet Mars in the 8th house AND the sign of their Mars is Gemini, well the music you should play is the Minute Waltz! This house corresponds to the 8th sign, Scorpio, sign of sex, death, regeneration, and other people's money.