There is a moment Clint McCune’s daughter, May, still can’t get through without tears. She was 5, maybe 6 years old, sitting in the family’s apartment one holiday season, when her father picked up his guitar and began to play — some of his sadder songs, ones that talked about love. “I remember oftentimes I’d have to go into another room because I was crying so much,” May recalls. “It just felt super personal to me. It just made me feel so much.”…