Seal wasn't "terribly fond of" renewing his wedding vows every year.
The 52-year-old singer - who split from Heidi Klum in 2012 after seven years of marriage - admitted the annual anniversary ritual became a "circus" and he didn't enjoy the attention they received for it.
He said: "That was my ex-wife's idea, to be honest. It kind of turned into a circus, which I wasn't terribly fond of because by default I'm quite a private person.
The 'Kiss From a Rose' singer - who raises kids Leni, 11, Henri, 10, Johan, eight, and Lou, five, with the 42-year-old beauty - admitted he went through with the ceremony because it made Heidi happy and though he thought it was "cool", he didn't think it was a necessary tradition.
He added to SiriusXM DJ Andy Cohen: "But then you know, you're married and you become a team player, and you understand that each of you have different lives, and you do whatever you can to support your partner's life. But the renewing of the vows, it was cool. I don't know how necessary it was, but it was cool."
Heidi previously spoke about how she and Seal found their yearly vow renewal "so special".
Speaking while they were still married, she said: "It's our time - a lovely family time. It's about remembering this moment of love we gave to each other and reinforcing it.
"It's so special to us, something we love and something our children have gotten accustomed to. It's like, 'Hey, Mom and Dad love each other and they get married every year!' "