In the last century, when I split in two, I was the second half of the population. The generation gap must exist. It's nothing special.
It's hard to speak with unfamiliar words, laugh at different points, speak in a generation gap, and feel embarrassed. With a good friend, you don't have to worry about it, say anything, a slip of the tongue, a smile, a few words and a few words, and more than half a sentence.