@poleguy I think that for parents who do a gender reveal it's all about expectations. "Oh, a boy! He'll play baseball and go fishing with dad!" or "Ohhh, a girl! She'll be feminine and love dresses!" which all all a bunch of bullshit. Just let kids be kids and figure out what they like. No pressure to be whatever.
(A "genital reveal party" sounds like a fun time between consenting adults!)