Just wait until 43. You'll realize that your plan to do a bunch of awesome shit during your 42nd year (because that number is the answer to the ultimate question of life the universe and everything) fizzled into basically nothing, and you don't even have the energy to jack off much, anymore.
The only consolation is knowing that your apathy will grow in proportion to your decay, so by the time you're TRULY incapable and decrepit, you literally won't be capable of giving a shit about the situation.
I'm 46. I did nothing for my birthday this year but get Indian food (which also get other times of the year). I think my wife got me some sort of not very expensive present, but I don't remember what it was. I've also been married for 23 years. I don't remember the last time we did something special or even gave each other gifts on our anniversary. This year, we spent it in a car driving to Niagara Falls for a family vacation.
I completely disagree with the sentiment here. My 40s have been great because they marked the point in my life when I finally lost my last fuck to give.
The freedom that provides is worth not being able to drink the way I used to in my 30s. Enjoy that achievement.
30's start to notice you can't do stuff you used to be able to do along with aches and pains but they are still once in awhile. 40's they are no longer once in awhile. 50's you are sorta used to them and its just another part of life is pain.
This honestly went the other way around for me. There was a lot of stuff I couldn't manage as a teenager and in my 20s, and a lot of pain I had that I don't have anymore. Though I definitely have to do more negotiating with my body about food.
But I started taking estrogen in my early 30s, which seemed to make a big difference.