It seems strange to have to state the obvious all over again: Both males and females should work hard to gain another's affection and trust. And one's sexuality is not a commodity that, given away too readily and too often, will exhaust or devalue itself. Tell girls that it is such a commodity (as they were told for a number of decades), and they will rebel. The author is conflating what the girls refuse to conflate: love and sexuality. Sometimes they coexist, sometimes not. Loving, faithful marriages in which the sex life has cooled are as much a testament to that fact as a lustful tryst that leads nowhere.
Just copying and pasting, while procrastinating.