@ShowOfHands
I asked teen DD this recently and she said it means the person is happy with she or they pronouns. So you can use she/her or they/them and the person in question will feel validated.
She did roll her eyes a lot whilst explaining. She's quite fed up with the whole thing.
You would think that wouldn't you from someone writing she/they but apparently it means that you must use both pronouns to describe someone. The singer Halsey uses she/they and was extremely upset because a publication only refered to her as a her rather than calling her her half the time and they the other half
www.buzzfeednews.com/article/eleanorbate/halsey-called-out-allure-no-more-press
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"First your writer made a focal point in my cover story my pronouns and you guys deliberately disrespected them by not using them in the article," Halsey wrote.
The musician announced in March that they would be using she/they pronouns going forward, later explaining that while they are happy for people to use either, "the inclusion of 'they,' in addition to 'she,' feels most authentic to me."
"If you know me at all you know what it means to me to express this outwardly," she wrote in an Instagram story at the time.
Despite the fact that Allure's cover story explicitly mentioned Halsey's use of she/they pronouns — and quoted them as saying pronoun preferences are "meant for you to help better understand yourself" — the magazine exclusively used she/her pronouns throughout the profile. It has since been edited to include both she and they pronouns.
While preferences differ for each person, generally when people use multiple pronouns, it is best to use them interchangeably unless they specify otherwise."
So who knows what your colleague wants (apart from attention)