My moment was a few days ago at DS2's nursery. DS2 said "oooh a baby Mummy" and pointed to a pram, a Mum beside me (who I vaguely know but not well) said "yes a very new baby as well", I said "oh, I don't know whether to look or not", she (has two boys as well) said "oh, you're not getting broody are you?", I said "I know it's not sensible but I could be tempted" to which she said "Oh no, you could have another boy, my friend had a third and ended up with three boys, I'd rather put hot needles in my eyes!"
I can confirm that I was completely speechless, didn't know what to say to her. Although if it had been a comment on MN I am sure I would have had the courage to speak up.