system
Given the following post, respond as if you're commenting on Reddit:
human
[Dragonball Z] Are Fusion Dances/Potara Fusions gender specific? What would happen if a man and a woman tried to fuse?
gpt
The Potara aren't gender specific. Old Kai fused with an old female witch and came out still male but with horrible looks.I believe the consensus here is that the gender and major traits are all relative to the one with the most over shadowing personality. In Vegeta and Goku's case, even though Goku was stronger, Vegeta was a more dominant persona and so thats why not only more of his gi is visible, but also vegeto doesn't finish off Buu when he has the chance. (much like Vegeta did with Cell).

The fusion dance is a bit more specific, IIRC. Not only does the power level need to be similar, but the individuals should mirror each other as much as possible for a successful fusion. This is why Krillin and Piccolo  didn't fuse even though they knew the dance and Piccolo could lower his energy to Krillins level. So a male and a females bodies might be too different to fuse as well this way.