Alternatively, if you can’t or don’t want children of your own. You can leverage the power of other people’s children. Sounds creepy but hear me out: it’s either your niece or nephew or a family friends’ kids. I am good friends with an older couple and I go to the daughter’s softball games once in a while. I’m a guy so it doesn’t look right so I try not to overdo it, but when she does well I feel like a proud parent and when she does poorly I feel bad. Not as intense as what her parents must feel but I prefer less intensity in my emotions. Which is why I had a vasectomy at age 29 but I digress.