On one of the threads on this site, there was a discussion about a lesbian who wanted to transition to a man (she didn't in the end, just turned out to be attention seeking), this lesbians partner at the time said something like "I like women" and someone commented that that was an awful thing to say and why didnt they support her. I find this attitude astonishing, lesbians like women by definition.
If my partner decided he wanted to transition to a woman the relationship would be over. Likewise, there's no way in hell he would stick around if I wanted to transition to a man