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.
Bacterial vaginosis (BV) is common and causes a vaginal discharge, often with a noticeable smell. BV is not a sexually transmitted infection. It is caused by an overgrowth of normal germs (bacteria) in the vagina. Symptoms are often mild, and BV may clear without treatment. Other cases can be treated with antibiotic medication. BV is a common condition of the vagina caused by an overgrowth of various germs (bacteria). It is not just one simple infection caused by one type of germ (bacterium). The vagina normally has a mix of bacteria, but in BV the balance changes. It is not clear why this happens.