I'm quite open-minded and couldn't resist asking some longhaul civvy trolly dolly friends of mine (male and gay) if these things happen (assuming the naughtier context). Most said it does happen. Sometimes, they said, other crew know what they're up to. If this proves to be the case, the odds are if a passenger complained to the CSD they would receive a polite/concerned response, perhaps an offer of booze, but in the end nothing would really be done about it. From what I've been told, the lads generally suss-out the attitudes of other crew members before taking the risk. All very fascinating for a boring bloke like me.

Personally I don't care. It's not happening in a seat or (what I'd consider) a public space, but behind a closed door. So to me it doesn't quite seem the same as public indecency/George Michael style incidents. IMO a 744 is an aircraft not a flying cathedral; as long as people aren't disrupting passengers or neglecting their duty I figure it's none of my business what 2 blokes do behind a closed door.