Girls, have you/would you let a guy drink out of your shoe for his birthday?

A couple nights ago my wife, her sister and I went out to dinner and then a bar to celebrate my wife's sisters bday. At the bar a guy happened to be celebrating his bday. When he found out it was also hers, he said it's custom for him to drink from her shoe for "good luck" for them both. Knowing my sis in law, I thought she would give a hard, "NO"! But surprisingly, she said, "sure, why not" and laughed. It was so uncharacteristic of her that I was shocked but also proud of her to actually loosen up and have fun. lol Would any of you ladies do the same? Do you see it as harmless fun or disturbing? lol
Girls, have you/would you let a guy drink out of your shoe for his birthday?
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