In this behind the scenes video of the Madonna shoot, he said: "There's a girl who works for us, Lucy, she's on the design team, and Adrian, one of the boys, was tying a little bit of fabric around and it reminded me of bunny. We were thinking of all these different things like can-can dancers, and I saw this piece of fabric wrapped around Lucy's head and said, 'Bunny ears, that's what we need to finish this look.' So we made all these bunny ears and that's how it happened. I like the kind of Playboy, French coquette aspect to it."
This just goes to prove, inspiration can strike at any time.