In other words, since time immemorial, women have put their emotional needs ahead of their erotic needs. She knows what turns her on, but she also knows what is more important than being turned on. She knows what she likes, and she knows what she needs. The choice is already made for her.

Stefan, understandably, has not deciphered this puzzle of the feminine senses. Like many men, when his wife withdrew, he concluded that she didn’t like sex. This leads us to another common misunderstanding that Meana’s work has highlighted: We interpret the lack of sexual interest as proof that women’s sexual drive is inherently less strong. Perhaps it would be more accurate to think that it is a drive that needs to be stoked more intensely and more imaginatively—and first and foremost by her, not only by her partner.

In the transition to marriage, too many women experience their sexuality as shifting from desire to duty. When it becomes something she should do, it no longer is something she wants to do. By contrast, when a woman has an affair, she brings a self-determination to her pleasure. What is activated in the affair is her will—she pursues her own satisfaction.