I suspect there is a generational issue here looking at the pro and con comments on bollock japes. But let me reassure you that there is an active industry on testicular pranks and humour:
https://www.billysballbags.com
https://en.wikipedia.org/wiki/Truck_nuts
These prank products have been developed from ball-bag humour over time.
I also repeat that this is not a single service thing and testicular japes have certainly been around since the late ‘80s in the Armed Forces of the world. I’ve seen it in the UK, US and Europe over the past 30 years. I guess it’s similar to the female boob flashing that I have seen at parties in and out of the services. It would be interesting to see if a female officer would be sent for CM if they popped their tits out on the bar! I’ve seen that too, and other naked pranks and also had my arse bitten by a female controller in a Mess bar in the late ‘90s. A CM offence? Not really. If this lad popped his spuds out for a prank and pinched a couple of bottoms in a drunken evening of madness, it should have been dealt with locally by the chain of command, probably a formal warning via MAAP, unless the individual is a repeat offender and higher sanction is required to correct the behaviour. CMs are lengthy and expensive to the public purse, is this really the best use of taxpayer’s money unless there were more serious sexual offences that have not been reported?
Avtur - some more detail here:
https://www.dailymail.co.uk/news/art...ng-bottom.html