We've got six stories about sports girls having sex: the boxer (ch. 1-4), the swimmer (ch. 5-8), the biker (ch. 9-12), the runner (ch. 13-16), the two wrestlers (ch. 17-22), and the gymnast (ch. 23-27). All of them involve the first time sexual encounter between a couple (or triad), with most of them having the characters express an interest in each other for the first time immediately before the sex (with the runner story being the only exception to that). All of the men in the stories also engage in the sport in question and the sexual encounters occur in a public place related to that sport, often with the men being called aside. They each have the woman initiate the encounter and be dominant to varying degrees (with the sole exception being the runner story, again). A few of them include some sort of competitive aspect to the sex. Other than that, I assume fit women in sports gear was the point of attraction the author was aiming at.