Apparently, a "gender reveal" party is where you can announce the sex
of your child.
Wikipedia has a greater vision:
What these gender reveal parties fail to address is the fact that the concept of “gender” is a social construct.
https://en.wikipedia.org/wiki/Gender_reveal
It must be very common that parties fail to address important issues.
Similarly:
What these so-called "birthdays" fail to address is the location of the celebrating individual relative to the international date-line.
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