person A: I always hate thinking that my son is getting old. Just like a few days ago_comma_ I was looking at some of my sons old clothes_comma_ and it made me very sentimental. I never want him to get old on me. 
person B: I believe you are really sad although it's a fact of life
person A: Yes. You get to see them change and grow. It makes it all worth it. 
person B: True_comma_ and the good thing is that when the kids grow_comma_ they provide moral support to parents.