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sexually transmitted infection
sexy
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sexual intercourse
sex·u·al in·ter·course


noun 
Definition:
 
sex involving penetration: an act carried out for reproduction or pleasure involving penetration, especially one in which a man inserts his erect penis into a woman's vagina
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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