id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
en-wikipedia-org-8549		Human sexual activity - Wikipedia			.html	text/html	9305	1111	58	Although the primary evolutionary purpose of sexual activity is reproduction, research on college students suggested that people have sex for four general reasons: physical attraction, as a means to an end, to increase emotional connection, and to alleviate insecurity.[11] This was correlated with greater closeness to their partner and higher overall satisfaction in their relationship.[17] Though both sexes engaged in sexual activity for self-determined reasons, there were some differences found between males and females. Any sexual activity that involves the introduction of semen into a woman's vagina, such as during sexual intercourse, or even contact of semen with her vulva, may result in a pregnancy.[25] To reduce the risk of unintended pregnancies, some people who engage in penile-vaginal sex may use contraception, such as birth control pills, a condom, diaphragms, spermicides, hormonal contraception or sterilization.[26] The effectiveness of the various contraceptive methods in avoiding pregnancy varies considerably.	./cache/en-wikipedia-org-8549.html	./txt/en-wikipedia-org-8549.txt