I'm sorry, I wasn't aware there were people who wanted to be told they were ugly, in so many words... I mean really, when people ask questions who -doesn't- want diplomatic answers?
I think answering questions in general is the courteous thing to do, but note that I'm calling it -courteous-, not saying it's an -obligation- or that anyone is -entitled- to an answer.
If it's info I could possibly use to better myself, then yes, I think that would be wonderful to have.
Anyway, I never claimed I wasn't hard work.

I was once asked how I've survived being single as long as I have, and I replied that every time I had the possibility of a relationship I think I would have ultimately ended up worse off if I'd pursued it.
Oh, and to be clear, I'm a gay male, so rejections from women are pretty much out of scope for me, for anyone who's making this gender-specific.
I once had a friend drop a multi-year friendship with me via a single email and claim that she'd tell me what I'd done wrong, but that I'd just claim I'd been joking at the time. Well you know what? I'd probably claim I was just joking at the time because -I was joking at the time-, and if she'd ever bothered to say, "I really don't appreciate those types of jokes, any chance you could knock it off?" then I'd have worked for that because we had an awesome friendship and losing some jokes isn't a big loss. However, I was left with nothing I could work with except the ridiculous idea that I should never joke about anything ever again.