It may help if I add in to explain that mystically growing is from vastly magical characters, who are able to change their form in pretty much any way they want.  When a sorceress can be eternally young, conjure fire and speak with spirits, changing your body isn't a stretch.<br/><br/>Other than them, it's not an on/off switch.  The characters end up hiding what they are, always have to wear pants or very long skirts until being discovered, and so on.<br/><br/>I appreciate the knowledge that it's a spectrum; I was under the impression that real-life hermaphrodites were pretty evenly mixed between male and female genes.  Thank you both for teaching me something new.