I have just started reading part of a file released by the CIA that they had inherited from the old Office of Strategic Services (OSS). It seems that Hitlers mother, Klara was actually a Czech by birth. And it also seems that Klara's husband, Alois Shicklegruber was in real life her first Uncle, thus making Adolf a spawn of incest. And in this file, it is also related that Adolf Hitler was also bisexual, as it is related that German sources before Hitlers rise to become Chancellor had confirmed that he had relationships with both Ernst Roehm and Rudolf Hess, among others, in Landsberg Prison after the failed Beer Hall Putsch in 1923. These rumors had persisted about Hitler since he first moved to Vienna following the death of his mother. This file I happened to come across while checking out another website devoted in part to UFO's and the paranormal/cryptozoology. The file also goes into his relationships with various women, including his neice Geli Raubal and the future Mrs. Hitler, Eva Braun. It gives a remarkable picture of a true psychopath that few people are aware of today.

You could well be right regarding his sexuality.

I was reading up on Hedy Lamarr and her marriage to Friedrich Mandl (One of the major arms suppliers to Hitler)

It seems that They participated in a 'threesome',which she obviously didn't want made public knowledge.
(The arrangement was not of her choosing.)

It seems that Hitler made his interests known to Friedrich,who then 'convinced' her to take part.

Who did what to whom and in which position wasn't made clear.