The distinction between organic and inorganic carbon compounds, while useful in organizing the vast subject of chemistry... is somewhat arbitrary. Organic chemistry is the science concerned with all aspects of organic compounds. Organic synthesis is the methodology of their preparation.
No, it is not possible to contract the typical STDs, such as syphilis, gonorrhea, chlamydia, hepatitis B, etc. from wearing someone else's dirty underwear. However crabs and scabies, may be spread in this fashion.
Also: 1  Don't douche because you don't want to send bacteria from your vagina up into your uterus. Douching upsets the natural balance of bacteria in the vagina. 2  Wear cotton underwear and loose bottoms for better air circulation. Cotton and silk underwear absorb moisture while keeping you dry.