I've never had a black/white moment, the edge has always been blurred, to the point of a continous graduated grey scale, for me.
I think I can relate to much of what Bobbi said, although in my case it is confused by being on and off PM at intervals. Most of my life I had a strange inability to do my 'male' hobby ( building small models) when x-dressed, which I could never understand. The last 2 or 3years before I retired I worked from home and could wear what I liked most days as long as my wife wasn't having one of her 'anti-Pansy' periods, but I started to find the male/female activity barrier was breaking down and to some extent the female side actually wanted to be 'allowed' to do male things. Since retiring 3 years ago I found it was often more convenient not to x-dress ( I could do the front garden without fear of being seen, for instance). A couple of months ago I had a one of those "chats with the wife" and she said she now accepts the female said of me and I can wear what I want at home. Since then I've worn a dress once, although I do wear a bra almost every day and heels with jeans most days. I've described it before as wearing what any woman might wear day-to-day at home. However I've been on E/PM for most of this period and I know that will have reduced the x-dress urge. I've been on nothing for the last week and I think I can just feel the urge re-emerging.
Dunno if this answers the question or not??