While I concede that I know nothing about your own body, I sincerely doubt you're going to tell us that asexuality exists only as a matter of anatomical coincidence.
Definitely not; IIRC the fellow(s) I was arguing with seemed to be equating true humanity (in the mental sense) with sexual functionality and activity, because apparently asexual and agender people don't exist/are sub-human (and no one took into account the lack of humanity in sexually-functional/active animals). Whether not it was considered more important than sentience, I can't remember.
I wouldn't rule out romance, if only because of Zero/Iris, but I'd like to think that it plays out differently than the human variety, because I find psychological differences between robots/Reploids to be interesting (and why I find most MM porn to be annoying at best, because those differences are rarely even considered).
I would like to get back to topic, but I can't think of anything to say about robo-necromancy that hasn't already been pointed out...