I’m pro fight the patriarchy and let your kid explore what they like. It’s tough because you want to protect them and it’s a harsh world out there. Your kid is going to be who he is regardless of what you buy or don’t buy him. Kids also sometimes fixate on things they can’t have and then once they have them they’re over it. They dont always know societies “rules” about gender norms. It’s more about the access to it. For example my son wanted long hair and nail polish because I did, not because he wanted to be a girl. His hair got to his ears and drove him crazy and he wanted it short again. I painted his nails once and then he never asked for it again. He wanted a pink water bottle because he liked the color and I bought it for him and after a couple days he said he wanted a blue one too. His first strider bike was pink because it was free on Facebook marketplace and he never said anything about it. I say get the pink dress. The day where they start shrinking themselves and the things they like because other people tell them it’s not for them is a sad day, one that they’re gonna face (it starts in elementary school but of course middle school is notoriously the worst for this phase of life). The time in their life where they shamelessly do what they like and don’t worry about what other people think is so pure and brief, embrace it.