A rolling stone gathers no moss! I have always identified as way younger than I am and will be that way til I am gone or down and out I hope. What keeps me young now at my vintage is fighting trained martial artists a few times per week, along with a relatively active lifestyle. I do participate in waves and don't eat the best but those are tweaks we can always make and test our willpower to stick with it.
Inevitably, we all think we are immortal and time is infinite.....'til it is not. I know there will come a time where I will regret the sum of my decisions and habits when they manifest themselves into a real problem, which there will be no solution. What I will not regret is enjoying that cupcake in the moment, and work to turn that into motivation to be extra active and have a salad instead of some pizza.
Still, time WILL catch up to each of us and we will look back and wish we made different decisions. Hopefully it will be accompanied by a lack of regret for a life well lived.