Glad to hear that, MrsM
I must confess that I only know AF as Aunt Flo and I couldn't see how that applied to your DH... 
We don't blame DS at all. Lots of cuddles, a trip to the loo while Daddy changes the sheets and quickly back into bed. He is dry for weeks, sometimes months, then suddenly has a run of accidents. It usually ties in with him being ill/coming down with something/being overtired. He very, very rarely has an accident during the day.
I'm reluctant to put him in pull ups, because he is a lazy little bugger will always take the easy option and I'm worried he will just revert to weeing in them even when he could wake up and get to the loo.
We'll see how it goes. I couldn't get back to sleep after we changed him, was just laid there until 3, then just as I was finally drifting back off he woke up saying his leg hurt. He wasn't sure which one so I rubbed them both, and eventually got back to sleep just before 4am. I'm tempted to close my office door and nap under my desk...