Coming of age

When each of our three boys were born we bought a bottle of port (not necessarily coinciding with the birth year!), to be opened on their 18th birthdays to celebrate . We are now on the second one (a 1994) and just about to have a sip. We have a 1984 and a 1996 left having already enjoyed a 1992 for Josh's 18th. So that means 4 bottles of port for 3 boys? Hmmm. I have just been informed that one is for the first grandchild!!