This is just a guess, but I think relationships where "one partner attempts to look and act like a man" are more of the older traditional way that lesbian couples related. I think that today, because the younger generation has grown up being encouraged by some to "explore" sexual options, there are more and more women who have experimented and decided they like the way women are more open and loving partners.
I always used to say that I never understood why women liked men, but I was glad that they did. I said (and meant it) that if I were a woman, I would have to be a lesbian. he, he. Let's face it, most men can be real jerks when it comes to love relationships. They typically only care about getting off and most could care less whether the woman has been satisfied.
I'm weirder than you.Example:When I was in the Army in Vietnam, we were paid once a month.One of the first things guys in my unit would do upon being paid would be to make their monthly trip to the local whore house.I would not go because I knew how I was.I do not have the ability to separate sex from love.I never have been my whole life.I knew that if I went to the whore house,there would be a good chance I would end up wanting to marry a Vietnamese prostitute.It kind of pisses me off because I probably missed out on a lot of fun during the "free love" era of the 1960s and 1970s.But that's the way I am. LOL