You make no sense, and you're resorting to fear mongering in order to make some kind of point. People contract STDs from their married partners all the time, including HIV. And speaking of HIV, it's no longer a death sentence like it use to be in the 1990s so as long as you take your medication. That said, the only safe sex is no sex at all because being married to your sex partner won't protect you from contracting an STD if they decide to cheat on the side and bring something back home to you. http://forums.poz.com/index.php?topic=61698.0 As far as living alone, I work with a lot of eldery people so I see how most peoples lives end up. In a regular marriage, it's usually the male who dies first, leaving the wife to live alone for even up to 20 years. Even if they had children some never come around to visit.