[Alas Babylon!]

I did a search on "Sweatpants with a fly".

Got a ton of hits...

Discover These 14 Joggers and Sweatpants with a Fly for Men [2023]

You got to use better Google-Fu powers, dude!

[Larry Lucido]

I’m sure the J. Peterman catalog has something. Look between “Urban Sombrero” and the “Gatsby Swing Top.”

[Paul R.]

But that’s not the point. MOST don’t, virtually none do if your budget is Wally World or similar, and so my question was why most don’t. I suppose it saves the manufacturer a few cents...