The implications of this are quite far-reaching when you look into it; there are plenty of stories out there about women who went on or off birth control and found their boyfriend/husband unattractive. While I don't think it's an exact science—and it likely varies from person to person—I find the whole thing fascinating.
I've noticed that most of the women I sleep with aren't on hormonal birth control, which suggests to me that I'm attracting the right kind of women—and that's encouraging.
A female friend of mine went off birth control because she and her boyfriend were trying for their second child.
At that point, she developed an uncontrollable sex drive, she turned into a nymphomaniac, but the one person she *didn't* want was her boyfriend. She was actually attracted to big, muscular guys.
Luckily, he managed to get her pregnant; after the baby was born, she went back on birth control, and now it's total love again. But my friend told me that the sex they were having before it's nothing compared to what they have now.
Her boyfriend is very effeminate, a real teddy bear, but he turned into an angry snake when she wasn't on hormonal birth control, since He had to manage her because she was so crazy.
It's exactly as you say, Flexpert.
In this case, though, with birth control on, it means the woman is less likely to cheat, so the relationship might be more successful.
That said, I do believe there are specific moments when, ,even while on birth control, a woman might still feel the urge to mate with a more masculine guy.
My hypothesis is that this invention had the greatest impact on inter-gender relationships. In the United States, it was approved by the FDA in 1960, and then everything else—such as no-fault divorce, abortion laws, child custody laws, welfare laws, fiat currency, the extension of credit to unmarried women, and the decline in marriage and birth rates—followed afterwards.
As I understand it, history and experience suggest the opposite: birth control actually allows women to stay longer in relationships with partners they don't truly want.