And sometimes, if you're really lucky, your brothers are engaged or married to top class birds who are like real sisters to you.
And you can go and stay with one of those brothers and his bird in Glasgow, and you can meet up with the others and friends you met at the wedding, and laugh your ass off for an entire weekend.
What's also great is if you have Internet friends you've never met before, who, when you do meet them, seem to be more like great mates from college you knew really well then but just haven't seen for a long time.
And another great thing is when you meet your other Internet friends who you have met before, and they continue to be top class fun and you just hang out in one of those fantastic high-ceilinged Glasgow flats and play Wii and have a great time.
What's not great (in case you thought my brain had gone overly soft) is when you sit for about three hours in a freezing cold venue and discover that your top class comedian brother has been stuck on a bill with the kind of comics you would expect to see at Butlins or similar.
Sleety snow is no picnic either (I fully expect a hollow laugh from Queenie here). Nor is coming home to a house empty of all animals except the goldfish, who don't form much of a welcoming committee, bless them.
But we're all here now, and I'm going to tuck into the final Harry Potter book tonight.