Ive run into this problem quite a bit, as a long term pre-op. Who has been with a fair share of straight guys, it can suck. Also I think you misused the word masochist, a masochist would enjoy your situation. haha
It never bothered me that they wouldnt touch my bits. They did other things to please me. What ultimately bothers me, is they leave me for a cis woman everytime. Really, who can blame them? I mean if they are straight, and only into womens bits... as a pre-op, thats just a matter of reality. Its cool to find an openminded guy who loves you, and sees you as a woman. When it comes to sex though, they do want vagina.
I myself am pansexual, so I can get along with whatever bits someone has.
Stick to bi men, romantically and sexually they are much more fufilling.
I have had straight guys tell me if I had SRS they would be happy. Ive also had other straight guys tell me, no it wouldnt make a difference because they want to make children.
If someone is into only women, I find this problem doesnt exist nearly as much, except in the most extream lesbians. but... ive had quite butch women who had no problem with it whatsoever.