I've always wondered what was up with the sultry tone of Shirley Bassey's Diamonds Are Forever, especially since throughout the song you keep getting the impression that she has an obsession with diamonds bordering on sexual. So I decide to do some research on Songmeanings.net
This is what I find:
On one of my James Bond special features it has an interview with I think John Barry and he said he told Shirley to sing the song like it was about a penis .. instead of diamonds.
You can kind of see the connection in the lyrics:
"They are all I need to please me,
They can stimulate and tease me,"
"Hold one up and then caress it,
Touch it, stroke it and undress it,
I can see every part,"
IT ALL MAKES SENSE NOW! XD