The thing is, the truth only elicits more hurtful comments.
So, so many times I'd explain I can't have children, when asked.
But then comes:
"Have you thought about adoption?"
"Oh that's sad, I totally understand, it took me 3 months of trying to have my little Lola."
"Well, my aunt Mavis's hairdresser was told she couldn't have kids but she had sex on her head while eating pineapple and then she had twins!"
"IVF is good isn't it? Could you try that?"
And the worst:
"Well you never know, it might happen one day!"
So now when I'm asked, I tell them it's a very personal question and I leave it at that. I don't care that they're uncomfortable, they shouldn't ask, I never have.
It's very easy to know if someone has kids, at some point they'll be mentioned!