2 years ago, my dad was having back/knee/rotator surgery following an accident, dealing with a benign brain tumor, and spending 22 hours a day in his room depressed. I had a son and it changed his life forever. He now exercises, runs a small business, and they're actually becoming foster parents. Having a little rugrat around totally brightened him up, gave him a reason to be.
I'd say you impregnate a girl and give him a grandson.