In an interview with Austrian filmmaker, Rudi Dolezal who has made a few documentaries about Mercury, he says, "Freddie invited me to his private functions often, and, at one dinner party, the guests included Rod Stewart and Elton John."
"I remember there was a lot of bitching about other artists and about themselves. I think Rod came up with the idea of forming a group called Nose, Teeth & Hair, because Rod had a big nose, Elton had problems with his hair and Freddie had his teeth," he tells New York Post.
Mercury was born with four extra incisors that pushed forward his front teeth into a distinctive overbite. Although he has been very self-conscious about his teeth, often covering them with his hands or upper lip when speaking, Mercury never fixed his teeth in fear of how it may affect his vocals.
In Stewart's 2012 autobiography, he recalls discussing this at Queen's Bel Air rented house in Los Angeles, describing Mercury as a "sweet and funny man whom I really adored".