Mate Choice Strategies argue against special creation

I'd say the answer might be a bit more simple. During the peak fertility phase, a woman is bound to be a bit more, pardon my language, but horny. Naturally, they would go for a male of high testosterone b/c these will tend to be the rugged, athletic, attractive type. Type of men that a woman would lust for while not necessarily desiring a longterm relationship. So from a purely, physical sense they will be looking for a more attractive person to sleep with. During the less "horny" times, obviously a woman will want to be with someone that is caring, sweet, attentive to her needs which would fit your men with higher estrogen ratios. These men are likely more "marriage" material. This would also explain your reference to women being more likely to cheat during the peak fertility phase. They're horny, perhaps they're not getting the attention they would like at home, so they get with the rugged, athletic, attractive male.