Have you all seen this post by Shyfoxling?

[sweettalkeress.livejournal.com]

I'm Dreamwidth friends with her so I noticed she was exploring Pottermore.

What she found was this.

I left a comment at the bottom of the page with my initial thoughts, but now I'm torn between that and WHYYY DID ROWLING THINK THIS NEEDED TO BE EXPANDED UPON?!

Still more credence for the theory that Rowling has the mental maturity of a twelve-year-old?

Comments

[darth-eldritch.livejournal.com]

Maybe they don't even lift their robes.

OMG, too funny. I was thinking the same.

[oryx_leucoryx]

So real wizards go commando?

[condwiramurs.livejournal.com]

Isn't that canon? I vaguely recall some wizard boasting about it.

[oryx_leucoryx]

Archie at the QWC wanted a healthy breeze about his privates, which is why he wore a dress when he tried to go in Muggle clothes. OTOH Severus was wearing underwear when he was assaulted by James and Sirius. (Did the popularity of Levicorpus change wizard fashion?). Oh, Ron has underwear, which Hermione washes in DH.

[sweettalkeress.livejournal.com]

It's entirely possible. I know it was referenced in Terri Testing's old fic "Liberacorpus."