Take the recent snowfalls in the past few weeks, as a kid I loved snow, loved to play, to build snowmen, create angels.
But now, I only like it in my dreams or imagination, because I have to drive to work or to class in that snow.
Another is using the word, "Boyfriend" I never use that word when introducing my companion, because saying "boyfriend" sounds adolescent and childish.
That's why I always introduce him as: companion, partner, significant other, consort, or partner in crime.
I love using the last one, people get concerned, in a good way.
There are many other things I found that I just can't do anymore. It may be tough letting go, but I always know that my children will enjoy them, and their children and so on and so forth.