...keep going on about how difficult life is for a parent of boys and how lucky I am to have a girl and I couldn't possibly understand...
Reason 1: I HATE competitive misery... who's life is harder than everyone else's, who wakes up more at night, who's kids beat each other up more etc etc etc
Reason 2: It irritates me beyond belief when people assume they know anything about a child's character and behaviour merely by tis gender. What morons would expect them to be like is totally irrelevant to what they really are like. My son played with dolls houses until he was 9 and my daughter recorded a fart tape at 10, thinkin it's hillarious, both of which are opposed to what little ladies and little men should behave like (boak)
Reason 3: without trying to be dramatic, I find it pretty ungrateful toward life to have two or three healthy happy children that you can afford to clothe, feed and educate and complain about their gender. But then the complaining is not really complaining, it's a disgustingly obvious way to seek some sort of parenting medal, related to reason no.1
And I'm sick to the back teeth of being told that at least their children will be friends all their lives because they're all boys, while my poor children don't have any siblings to relate to!!!!!!!
I know I would BU to actually punch any of them in the face, but AIBU to want to? At least the one who told me that I'm very licky to have a girl, they're angels!!!! 
You'd think that she's never been a teenager herself