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.
The blue coloring of the genital clearly indicates the signs of the disease on the affected. Its name is actually classified in STDs (Sexually Transmitted Disease). This might already have explained half of the story around the disease. Yes, it is a sexually transmitted disease once again. Technical Causes