Are there any slang that refers to "bone" as male's organ?

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I am an English teacher in junior high school in Taiwan. A week ago, two of the male students came up to me and told me their English teacher in cram school told them the word "bone" can refer to males' organ if it's a countable noun. (or uncountable? I can't be sure.) But I searched the net and couldn't find similar usages of the word. So I would like to ask people from English speaking country, are there any slang or phrase that's related to this notion?