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Fourth Base

Updated: MARCH 2, 2016

Fourth base is the final step in a physical relationship referring to penetrative intercourse. Fourth base is also referred to as home or a home run.

More About Fourth Base

The four bases are commonly used to describe what type of physical action a couple has together. Generally, first base refers to making out. Second base is rubbing, dry humping, and grinding. Third base is oral sex. Fourth base is penetrative intercourse.

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