history: Everytime my friend comes over and brings his kids, he never keeps a close eye on them and they ravage my place! When my friend comes over he never keeps an eye on his kids and they ravage my home! That is horrible! Have you ever said anything to him about it?
current: I don't know how to bring it up. I always hope he'd catch subtle hints like when I ask his kids to please not climb on my stuff!
next: Maybe you should mention that you just want a "guy's night" and he would get the hint? 