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.