I was 9 years old when I walked in on my grandfather in the bathtub. His wrinkled, hairy gray hose filled me with wonder. It was approximately 3 inches long and was flopped on his belly. His balls were extremely large, and hung quite impressively. The ball sack was not very hiristute, but his "happy trail" was quite advanced. In fact it extended all the way to his neck. Pubic hair abounded.
He was just sitting there reading a book. He asked if I wanted anything. I just stared at his cock for a few seconds and left. I still have visions of tossled gray bush and salt and pepper colored ball hair.