The last time I was dating was in the year before I met my now wife. I was in my mid 30s and dated quite a few women - the youngest being 19 and the oldest 45. It amazed me how different the dating scene had become in the 7 years I had been in a relationship prior to then. I found it quite unnerving how quickly a number of them were ready to sleep with me - not just the younger ones either. I felt like I barely knew them. One actually got really angry that I didn't want to go back to her place for sex on the first date - she thought it was a rejection. It wasn't - I just wanted to know I liked her before we got physical. It's quite difficult to be a gentleman these days. Plenty of women have accepted the unwritten rule you described above which no true gent would feel comfortable with, whilst others are so cautious after mistreatment they can have tangible problems trusting even the most sincere of men.
Call me old fashioned if you like, but I really want to get to know someone before I jump into the sack with them. I tried doing it the other way in my youth and it was unfulfilling. It left me feeling empty and kind of dirty.
BTW - I read a US academic paper about autistic women & rape not so long ago and it suggested that yes, autistic women are significantly more likely to have been forced into non-consensual acts, particularly if they had spent any time in a mental health facility. I don't have a bookmark for it but if I find it I'll link it.
Thanks, as always very good post!