<human>: Can you summarize the given text in a few sentences?

First, I'd like to apologize if this is supposed to be on the "downlow".

I work with 6 people, 6 of us are male and we have one female on our "team".  Yesterday, during some downtime at work, my co-workers and I were watching the Olympic Trials, and we happened upon Team USA and the Netherlands playing softball.  One of my co-workers, who is female and homosexual (this is relevent), used to play softball in high school and college and couldn't have been happier that we were watching the game.  After about 15 minutes, she asked if we wanted to know a "secret" about softball.  Intrigued and confused we said yes, to which she explained that **if a woman playing softball has a ribbon in her hair she is declaring she is straight and if she isn't wearing a ribbon in her hair it is almost certainly a declaration of being gay.**  She told us this is not just something that happened at her schools, but that it is univrsal throughout the country for women's softball.  She was unsure if this was universal throughout the world.  Naturally, we spent a good 90 minutes trying to determine who on Team USA had ribbons in their hair.

It was shocking to hear. So, I need the collective knowledge of Reddit to answer some questions we came up with:

-- Can anyone confirm that this is indeed an unspoken rule or practice? If so, is it just an USA thing or do other countries have this practice?

-- What about if you're bisexual, do you wear a ribbon or nothing or something else?

-- Do other sports, women's and men's, have such practices amongst them? If so, which and what (if you're willing to share, of course)?

Your answers would be greatly appreciated!
<bot>: It was mentioned at work that women in softball use ribbons as a means to signify sexual orientation -- how true is this? Does it apply to other sports? Men's sports?