Brain response to addictions- drugs, sex

Brain responds same way towards sex and drug addiction. May be brain responds similarly to all addictions.

http://timesofindia.indiatimes.com/home/science/Brain-responds-similarly-to-sex-and-drug-addictions/articleshow/38346588.cms

In drug addiction certain compounds are formed in the body system which have to be constantly replenished as they alter the body chemistry is such way that body can not function without them. Sex is a feeling of pleasure and is controllable passion.