You might want to differentiate between Top, Bottom, Switch and Top, Bottom, Versatile, i.e. BDSM vs penetration positions.
I'd also say that this is less about physiology and more about the individual acceptance of the concept of position.
Top, Bottom, Versatile is not necessarily a queer thing, since (cis&trans) heterosex can have positions as well. That is to say, not all queer relationships regardless of gender follow the concept of position.