You do, however, have to consider other aspects. It may be that he was merely expressing the misogynistic views popular at the time of his upbringing and using them to add versimilitude to his settings.

A lot of Starship Troopers (the book, not the film but both are great) reads like the journal of a soldier during the second world war (down to the antagonism between the navy and ground forces) and I suspect that he was writing about some of his own war experiences (I have no idea if he served or not or when but it seems likely that he did given his age) in the same way that Gene Roddenbury allegedly based a lot of the concepts in Star Trek on his time on a submarine in the navy. Now, if I remember my BDSM history 101 properly, didn't the old guard leather community arise from serving military officers during the 1950's? So there is a link there...

Of course, given the period he lived in it is unlikely that there will be any evidence of his sexuality or preferences for us to find... he certainly (as far as I know) did not 'come out' publically.

Its one of those interesting historic trivia things like the 'Robert E Howard committed suicide because he was gay and couldn't handle it' theories (something is made of this in Robert Silverberg's 'to the land of the living' when Robert Howard and HP Lovecraft meet up with Gilgamesh and Howard is making cow eyes at the muscular sumerian hero...