What do you wear during the gym sessions?
Wear your plug to the next one, and make sure at least five of your teammates see it in. At least two of those teammates must see it outside of the locker room.
Are you able to add to your toy collection? Get a remote controlled bullet vibe. Before each gym session, the team votes on who has to keep it inside them for the session, while everyone else takes turns with the remote. Discretely, of course