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.
Here are some of the most widely promoted products and techniques: Pills and lotions. These usually contain vitamins, minerals, herbs or hormones that manufacturers claim enlarge the penis. None of these products has been proved to work, and some may be harmful.