Btw, in the novel, something of the kind is said of Blofeld rather than Vargas:

"[H]e didn't smoke or drink and he had never been known to sleep with a member of either sex. He didn't even eat very much. So far as vices or physical weaknesses were concerned, Blofeld had always been an enigma to everyone who had known him."

I thought it was much better to make the chief villain a hedonist and hence more of an alter ego to Bond (like Scaramanga). I think they emphasized that by casting Blofeld with a relatively attractive actor that time (Adolfo Celi - Donald Pleasance seems to be the most popular incarnation though).

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