Female athletes get "voluntary companions"
Our protagonist just got a good scholarship to a school that is well known for its female athletics program. Excited, she goes off to summer practice and finds that her roommate is already there and really excited to meet her. Roommate explains that she's part of the "athletic assistants" program and is studying sport rehab so she got to move in early.
Protagonist and roommate hang out and have a good time though roommate seems to let her gaze wander a bit too much over protagonist's taut body. Still, she's nice and extremely helpful, so our lead lets it slide.
At orientation the next day, our lead meets up with other athletes, even ones who won't have their season start until spring...and all of them came with their roommates. She makes small talk with a few athletes and all of them are just surprised as she is about the "athletic assistants." Orientation begins and until the end, everything is about what she expects. However, at the end, one of the seniors running the event talks about the assistants, jokingly referring to them as the athletes' "wives" discussing how they are volunteers that will be there to help the athletes with university life and how to properly "unwind"
Then the shoe drops: no dating during the season and no dating teammates. The latter is laughed off but the first is questioned and the presenters don't budge. Athletes need to focus and dating random guys or gals could effect their performance.
The girls are surprised but it was lined out in their scholarships so they agree.
Later that night, she walks in on a teammate getting eaten out by their assistant and sees a pair of assistants making out with an athlete. Shocked she tells her roommate who cuddles up with her and explains the situation:
The faculty are very proud of their athletes and want them in top shape. When they let them date during the season, their performance suffered. When they got into relationships with teammates, the team would ultimately suffer. However, putting a complete ban on relationships also didn't work since their fit bodies had a higher sex drive. So they started a group of volunteers who take the role of a substitute. If the athletes need some emotional support, they can talk to their assistant. If they are pumped from practice and need to get off, well, their assistant is there too.
Our lead is shocked and tries to play it off as a joke but her roommate tells her she's quite serious.