That’s a pretty poor “tell”. Pony tails sticking out the back of caps keeps the cap in place. Lots of female athletes who use caps do that.
To tell the truth I think when a woman does that its sort of sexy. Me and this guy was on a elevator once when a woman got on with the ponytail thru the cap once and she was smoking hot. When she got off on the next floor, me and the other guy both nodded with approval.
That’s a pretty poor “tell”.
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Isn’t it though. Wearing a ponytail out the hole in a golf cap had valid reasons, but was coopted by LPGA lesbians. It parallels coopting of the word “gay”, the symbol of a rainbow, and any number of other insider gay codes.