Abstinence and faithfulness are often promoted as the only and best forms of protection against HIV infection. If the theory is true, in the real world abstinence and faithfulness have shown an impressive rate of failure. In a couple it takes two for it to work, and when single it takes an extremely powerfull mind to resist the call of nature, particularly under 30 (or more for some).
In a study published in Plos One, Keren Landman and colleagues examined the association between the number of sexual partners and HIV infection …