I also caught my two curled up together when we had loads of visitors recently - I was really chuffed to see they still love each other really! Having said that, Hendrix was grumpy with Jagger this morning and has had a hiss etc at him for what seemed to be no reason. Luckily Jagger pretty much ignores him. It is pretty rare that they sleep together now though, like you say, they become much more independent in adulthood.
We had storms here pretty much all night, lots of thunder and lightening. Jagger was in the snuggle bed and just seemed annoyed about the noise when he was trying to sleep and Hendrix was running around growling but came in with me, and continued to growl every time there was thunder! When the thunder stopped, Jagger popped in to knock a few things off the chest of drawers before going to settle on the sofa in the front room and then the foxes started having a fight outside my window (happens most nights lately) - more growling from Hendrix! Not much sleep for me last night