Kamasutra Condoms are useful to reduce the risk of contracting human immunodeficiency virus (HIV), the virus that causes AIDS and other sexually transmitted diseases (STDs). They are also used to prevent pregnancy. The effectiveness of Condoms for STD and HIV prevention has been demonstrated by several laboratory and epidemiologic studies.ï¿½ The Swiss Pharmacy, Geneva Switzerland. Dotted KamaSutra condoms have especially been designed for more pleasure. The textured design allows greater stimulation and adds enjoyment for both partners.