My DH is in his 40s, still hangs around with a few of his old uni mates. They are mostly decent types, more bookish than laddish.
They like to play dungeons and dragons, so I am used to vacating the dining room with the DC most Thursdays whilst they sit around pretending to be elves 
Recently though I overheard one of his friends (who sort of is an umpire and describes what is going on) describing one of the others performing a sex act on the DH's chaeacter . I listened for a bit and it seems to be if a character messes up they have to do degrading things for the other characters, they used the term 'sex cauldron' or something like that.
Now this cracked me up for ages, but as the weekend wore on I started to get annoyed with how puerile and juvenile it is especially for a bunch of 40 something's!! So tempted to say something to DH and stop them playing - feel like I have an extra DC!!