Lap dancers on heat are the ones to watch - being-human - 11 October 2007 - New Scientist

http://www.newscientist.com/article.ns?id=mg19626255.100&feedId=online-news_rss20 --- Last month, biologist Randy Thornhill challenged the orthodoxy that women do not undergo regular bouts of hormone-induced oestrus, or "heat", when they are at their most fertile - something most female mammals experience (New Scientist, 15 September, p 18). Now a study of the tips men give to lap dancers, conducted by a colleague of Thornhill's, lends further support to the argument for oestrus.