I only have two right now, but it'll probably become four in September. I look forward to the day when I own a house and can have a snake room for many more...
I recently saw a joke on Facebook about that curve, something like "Notice how you never see anyone with three snakes? You get one or two and then jump straight to eighteen." Obviously not true in every case, but it's funny that I came over here and saw the same observation pop up again.