John has never once even attempted to keep his attraction for his Lieutenant a secret. He couldn't care less if anyone could see him eyeing the man anytime he bent over or if he let him get away with things he wouldn't let anyone else do. He was the Captain, it's not like they could really say much against it, and the soldiers at base liked him enough to not snitch to the higher-ups.

What John and Simon got up to in their free time was even less of a secret, the two didn't attempt to be quiet no matter where they decided to slip into for a quickie. They've had their share of nights where they'd gotten complaints from whoever was unlucky enough to have the barracks room next to the Captain, or from the lads who managed to walk in on them when they chose less than private places to slip away to.

There is one specific bathroom on base that was often heavily avoided by mostly everyone. The one closest to the training grounds, the most private one and the cleanest one. It was known that it was the one place that was most commonly used by the Captain and Simon, and no one wanted to risk the bliss of privacy to take a dump and end up walking in on the man balls deep into the Lieutenant, or getting stuck in the stall while they go at it.

They don't even check if anyone was in there when they stumble in, they never did because no one ever used it anymore. That was their first mistake, thinking everyone either knew to not go there, and thinking no one would risk using it if they did know. John was too focused on getting Simon onto his knees as he was pressed up against the sink, his hands gripping the edge of the countertop so hard his knuckles turned white as Simon teasingly sunk to his knees so slowly.