Do you think our response of helping others decreases or increases...

I think that depends on a person experiences. Maybe someone has goten burned too many times when helping others...then with age, that person would decrease in helping others. But if a different person had good experiences or someone exposed them to helping others and that one found it rewarding, then I would think that it would increase with age. Personally...I have always tried to help others. Even though I have been burned many of times, I will continue to help others. It is my personality. And not with the age of th internet, I am able to reach out more and help in my own ways. Great question!

I do not know~ increase or decrease~

I'm not sure, I don't think I've ever thought about this, but I would guess that it increases because we are finding that we have gone through such similar situations before, thus making us more willing to help others.