Those pretty panties can be pretty uncomfortable. Apparently that's why your date may have them stashed for the old switcheroo later on.  Heathen has the story for you.

 

I guess "just in case" underwear are a thing. I'd say they're a good thing, if the girl you're with is packing them. Okay, I'm starting to feel a bit sleazy, so I'll just pass you onto Heathen who has the story (and never feels sleazy even when he's sleazy).