When I started my transition, I was not and never had been interested in men. I have always had fantasies being the female in M/F penetrative sex, but the actual guys have always freaked me out.
With HRT and over the years of my transition, the kind of reaction that men show towards me has started to shift from frowning, ridicule and disgust towards ogling and daydreaming while checking me out (pity I haven't had one run into a wall or a signpost because of me, though).
It came as a complete surprise to me how much I like their positive attention.
Now, when I return their gaze, I am very conscious of my new anatomy, what I could do with it, and how that would feel like for them. They can see it in my eyes. It adds so much to my confidence, it gives me a feeling of power I had not known before. I would never give that up.