Reasons to Be Cheerful

Phoebe Maltz writes:

I mean, if you're going to be dumped, what reason, other than 'I'm actually of a sexual orientation that prevents this from working out', could be so not-insulting as 'I had a chance with Natalie Portman'?

Is that really the least insulting reason to be dumped?  I mean, of course, if your significant other turns out to be gay (or straight, I guess), they can honestly say, "It's not you, it's me."  On the other hand, doesn't this sort of imply that you are, well, the sort of woman or man that someone who is not interested in your gender would want to date?  Maybe I'm just oversensitive because due to my height, I am frequently actually mistaken for a guy by people who aren't paying much attention.  But I don't think that I would find this a more consoling reason to be dumped than "Hey, it's not working out."