I'm a single mum - hitting 30 next year.
I've had a range of ridiculous comments thrown my way over the years:
"Must be hard for you without a man."
I quite like it, thanks.
"You just haven't met the one yet."
I'm not interested in meeting the one. And while we're on the subject, the one is a bullshit concept. Grow up.
"Are you gay?"
No.
"You must want to get married though!"
I really don't.
"But it would be nice if DD had a daddy though, wouldn't it?"
She does have a dad. He just happens to be an arsehole, and an absent one at that.
"But don't you want DD to have siblings?"
No. One child is plenty for me, thanks.
"Everyone wants to settle down eventually. You will too."
Because apparently, my life holds no meaning and no validity until I have a man in it. I've raised a child on my own, I have my own (absolutely beautiful, I will add) house, a steady income, wonderful family and friends and I take us on as many trips, outings and holidays as I can afford. My life is a very full one and I am very lucky. Where in any of that does it sound like I need a man? 
"We didn't think you'd want to come, what with it just being all couples."
Or you don't want to watch me have a good time among couples as a single person because you don't understand my independence, my choices or my ability to wander through life not glued to a man, unlike you. You also don't want to sit and watch me enjoy myself and crack jokes next to your husband because you're jealous, insecure and worried I'm a threat to your relationship. I'm not, for the record. And they are all your issues. You should work on those, btw.
It's a mix of comments from both men and women, but definitely more women. I get the feeling they both pity and envy me. It's a really strange combination. Because I have a child, the childless pity element is removed, but the 'you're all alone' pity remains. But it goes hand in hand with a sense of envy - because I'm strong willed, I'm independent, because I have a nice life that I have carved for myself without needing anybody's help and most of all because I enjoy the freedoms of being unattached. And a lot of women I have come across just don't get how it is possible, because they have always been reliant on another person.
I should note - I don't want any of that taken to mean 'all women'. Not by any stretch! I mention everything above only in relation to the personal experiences I have had.