I may come to regret this but I ask you to conjure up your own picture.
Last time out, I was aware that something was not quite right in the shorts department. There was an unsightly bulge at the front, but also an odd slightly uncomfortable feeling in the saddle area. Anyway, I was too busy riding to investigate further.
Then I stopped for a pee!
What's this? The waist band of my padded shorts was much higher than usual at the front, and what's that white tag?
Yep, you got it. I had only gone and put my padded undershorts on back to front!
When I look at them, I still can't believe that I didn't notice as I was putting them on. I mean, front and rear are markedly different. What a Muppet!