HISTSEX:
a discussion list for historians of sexuality. A place to post announcements of conferences, calls for papers, information about and reviews of new publications, requests for information, points for discussion, concerning
Historical perspectives on sexuality.
Hall of Contraception.. An online article looking at the history of contraceptions since ancient times.

Erotic Print Society:
erotic books, art, photography and literature. Started in 1994, the "EPS" is now firmly established as the leading source of collectable erotica worldwide.

World Museum of Erotic Art
Merkins
A "merkin" was apparently pubic wig dating back to the 1400's. Supposedly they were originally used by prostitutes to cover up genital sores from STD's, or to replace body hair that was shaved off to eliminate lice - or so says several websites I found after stumbling across the word. Apparently they are still made for strippers for working in communities who have regulations against the bald look, and fancy ones to flash from under miniskirts are being made for nightclub wear (bright colors, beaded buterflies etc...).
Just for fun, modern merkins:
Merkinworld.com | Coco-de-mer
wildpartygames.com
Party game books, adult games, party accessories & much more at wildpartygames.com
Adult resources - directory of adult websites.