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1 definition by RabidPyro

 
1.
it stands for SPECIAL SEX INTREST.it means your intrested in a certain type of sex, but it's not a fetish.
my recently married friend gave me some sex videos that all had foot fetish porno.later on i thought i developed a foot fetish.but that same friend just told me it was a S.S.I.
by RabidPyro July 06, 2009