Interesting quote I found from an interview with Wallis:
“He had a terrible problem, you see. He had been brought up by very strict parents… harsh and authoritarian. The atmosphere at Buckingham Palace was incredibly Victorian, prudish, and narrow-minded. To make it worse, David had a very sensitive soul. After reaching adulthood he quarreled bitterly with his father over everything. After getting to know David and realizing that he was a desperately shy young man, full of deeply ingrained inhibitions of the most incredible kind, it became clear he could have never been a wild libertine. In those days, people never spoke of such things. But I had been married twice and knew instinctively that he had never really fulfilled himself in a mature, adult relationship with a member of the opposite sex. I loved David for his wonderful spirit and his fine mind. In time, when he grew to know and trust me, our relationship became a totally fulfilled one. I realized eventually he was totally happy with an understanding woman for the first and only time in his life.”