How does sex addiction differ from drug or alcohol addiction?

How does sex addiction differ from drug or alcohol addiction?
 
  a. Those with sex addictions tend to cause more emotional harm to their families than those who are addicted to drugs or alcohol.
  b. Those with drugs or alcohol addictions tend to cause more emotional harm to their families than those who are addicted to sex.
  c. Withdrawal symptoms do not occur when a sex addict abstains from sex, but do occur when a drug or alcohol addict loses access to drugs or alcohol.
  d. Withdrawal symptoms occur for both sex addicts and drug or alcohol addicts, but the symptoms are more severe for drug or alcohol addicts than for sex addicts.