What is Intercourse?

Legal Definition
Communication; commerce; connexion by reciprocal dealings between persons or nations, as by interchange of commodities, treaties, contracts, or letters.
-- Bouviers Law Dictionary
Legal Definition
Communication; literally, a running or passing between persons or places; commerce. As applied to two persons, the word standing alone, and without a descriptive or qualifying word, does not import sexual connection. People v. Howard, 143 Cal. 316, 76 Pac. 1116.
-- Black's Law Dictionary
Legal Definition
Communication; trade; commerce.
-- Ballentine's Law Dictionary