> there's a smaller group of women who sleep with a greater number of men
That's a falacy. If a small number of women raise the number of their sexual partners, the rest of the women must lower their number of sexual partners, to keep the average the same. That's not the way to explain the deficit.
The average number of women who cheat? Or of men? Either one doesn't change if a small group of women has a larger number of partners, though the average of men who cheat may increase.
That's a falacy. If a small number of women raise the number of their sexual partners, the rest of the women must lower their number of sexual partners, to keep the average the same. That's not the way to explain the deficit.