May have been using the spoon as a way to protect himself from getting STDs.
http://alcoholism.about.com/cs/hepc/f/hep_faq7.htm
For oral sex, use a dental dam - a device used by dentists, made out of a rubbery material, that you place over the opening to the vagina before having oral sex. If you don't have a dental dam, you can cut an unlubricated male condom open and place it over the opening to the vagina.