When I told him I was going to bed he actually just grunted at me. Lol!
I realised I never just let him go to his cave before because I didn't know what was going on so it freaked me out and I'd just keep asking him what was wrong.
Now that I understand I actually just find it hilarious.
Have you read "Men Are From Mars, Women are From Venus?" It's a classic, and really nails the male dynamic. I'm pretty sure that's where I learned about the "rubber band" thing.