Rasha wrote: "A woman’s flush-surfaced urethral orifice would make such a design impractical."
I wrote:
Well then, how about a "trap door"?
The rearward facing trap door goes back 1910 or so (Cooper Underwear Company; Jockey International, today). A little trap door on the front could facilitate the female standing pee as well as other activities down in those regions, without having to stretch the fabric to the left or right.
(I can't find a trap door panty with an actual trap door, just Trap Door BRAND panties and thongs. If someone copies my trap door panty idea, I hope that this post ends up in evidence during the patent lawsuits.)
Speaking of the female standing pee, there are plenty of devices and conveniences available to outdoorswomen who climb mountains, ski, travel in harsh areas, etc.. When you're strapped to a nearly vertical rock face in a blizzard at 10000 feet it's nice to be able to pee like a gent. When you're hiking in a bug infested jungle, it's convenient not to have to drop trou and expose extra parts to the hungry bugs (or horny co-travelers).
NEW: The lady who invented Spanx (Sara Blakely) is a billionaire. Maybe we can get something going here and make a few bucks