ok here's the speculation - Hitler's relationships with women were spectacularly unimpressive. As a young man he'd never been one for the intimate company of women , although he would socialise with them easily enough at the opera, for example. His only close relationships were with men. There are several occasions before WW1, nights when he shares *rooms* with male friends, that he never mentions again once he began his political career. During WW1 his comrades and officers remarked at his oddness in that he never chased after girls like they did, and refused all advances from local girls. His relationship with Eva was completely non-sexual. His oprderlies and servants never detected any evidence that they ever did anything like that at all. certainly Eva complained that he never bothered with her.
imho he was a closet queer, and if you go with this for a mo', it explains a lot. His paranoia, secretiveness, emotional imbalance and decietful nature, are understandable if you grant that he's attracted to other men in a society and personal circumstances that make it impossible for him to declare this openly, or even to fully admit it to himself. No wonder he was psychotic. It also explains why his relationships with women were supeficial, why Eva was just carted along so that the rest of the Nazi hierarchy thought he was straight, why he never got married (except right at the end) despite pressure on him to do so, and also why Geli killed herself.
it is just speculation, without reviving the b*st*rd from whatever hell he's languishing in and beating the truth out of him, we'll never know. But it does explain a lot.
wanna hear my other theory about Hitler? so contentious it got me banned from 3 usent newsgroups?