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Terms named after baseball bases, that determine how intimate a sexual activity was. The bases are different steps of making out that often lead up to sex (straight, gay, or lesbian sex). Note: When it is the person's first time, it must go all the way home for it to be considered a loss of virginity. First base: Kissing (Making out, French kissing, hickeys) Second base: Clothed stimulation (Feeling up, clothed grinding) Third base: Unclothed stimulation, one partner to another (Hand job, anal or vaginal fingering, cunnilingus, annilingus) Fourth Base: Unclothed simultaneous stimulation (vaginal sex, anal sex, mutual oral sex, tribadism, frottage)
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