Gee. Option 4 wasn't value-loaded much, was it?

I used to wish my ex was lesbian. I tended to identify her as such. She's presently in no romantic or sexual relationship, and practically all her social relationships, outside of work, are with women. There have been times when I have even wondered whether she might a transman, but have to admit much of that was probably projection on my part.
I was offered at least a short-term relationship from one of my first trans-sisters, who came out to herself in many ways in parallel to me, but was far more resolute in seeking transition. The only reason I didn't act on it was that I was already in a relationship with the aforementioned partner, and was still hoping that she would see fit to adapt herself to my emergence. The trans-sister's eventual ex also became a close friend, and made a quilt for our first child. We also went shopping together at a funky fabric warehouse in Philly several times. Some of my reservations were as much to honor my friendship with my trans-sister's partner as to honor the integrity of my own partnership at the time. But I was extremely curious, and after separating, very nearly followed through on the invitation.
In light of my most recent brief tryst with a long-time friend, I think I also realize that for me, a sexual relationship almost cannot exist without me also losing my heart at least a little bit, and becoming attached, and by the time it was possible in my mind to pursue that offer, it was also clear that my trans-sister was already in the middle of a new, seemingly committed relationship (with another transwoman).
I do tend to think that any lasting relationship I could have is far more likely with either a cis or transwoman, than with a cis man. I do wonder what could work out, though, between myself and a transman.