Pyschology Today has published this study of New Mexico strip club employees that makes a strong link between ovulation and tips. An excerpt from the article...
Dancers made about $70 an hour during their peak period of fertility, versus about $35 while menstruating and $50 in between.
What blew me away was this:
Women on the pill averaged $37 (and had no performance peak) versus $53 for women off-pill. The contraceptive produces hormonal cues indicating early pregnancy, not an enticing target for a would-be suitor. Birth control could lead to many thousands of dollars lost every year.
This is fascinating stuff - and I definitely sent this article around those friends who noticed the difference over their period. I wonder if they've noticed a difference on the pill. Have any of our faithful readers noticed a difference in your pheromone output since you've been on the pill?