['Hey there, I had an embarrassing situation today..', "Oh, I'm sorry to hear that! It can be tough when we feel that we have lost face in front of others.", 'I was at the grocery store when I noticed my fly was undone!']
Well, let's pretend that no one noticed! Either that, if someone noticed, perhaps they smiled when they thought Wow, I've had that happen before, too
I was shopping at the grocery store when I noticed my fly was undone.