[BR1985]

Wear your chastity and your “I love sucking dick” tshirt. Also take a jock and your workout clothes.
Pick a locker as far from the showers as you can.

Pre-workout, strip down to your underwear - first pants, then tshirt, then socks, then carefully fold your clothes and put them in the locker. Once they’re away, strip to your cage and get your jock out. When changing you should always be facing the changing rooms and on display.

Carefully take the cage off (don’t want you getting hurt during your workout, right!), then put the jock on.

Now you can get your workout clothes out of your bag and put them on.

Go have a nice long workout!

After you’re done, strip naked at your locker, then walk with your towel over your shoulder to the showers, and shower without shutting the curtain properly. Make sure to really clean your hole and cock well.

Walk back to the locker naked, and then lock your cage back on before you take anything else out of your locker. Once the cage is on, take out only your cocksucker undies and put them on - take the time now to check out how you look in a mirror. Once done, you can get dressed - socks, then tshirt, then pants.

For added humiliation here’s some bonus options:
Strike up a conversation with someone while in your cocksucker underwear or just the cage.
Edge while in the shower
Make sure you’re shaved from the neck down before starting the dare
While you shower leave your locker open with the cage and cocksucker underwear on display.

Enjoy, and let us know how you get on.