Even though I have/had children and loved it, I can sympathize with you. I know people make child-free women feel uncomfortable. We had a great time raising our children (although we had hard and unfun times, too!) But I can't say that is the reality for every mother.
Have you seen Nanny 911? *ack* If all children were like that, I would be happily child-free, too!
I hear true and horrible stories about parents with grown children who now treat them like [censored]. So, don't think that having children ensures company in your old age! One can say, "Well, it's the way they were raised--poorly!" True. But sometimes, kids just turn out selfish or rotten due to external influences through bad friends, drugs, booze and television, etc. Even in good families.
Other good things you have over mothers:
1. No stretch marks or stretched out bellies.
2. No saggy breasts from breastfeeding.
3. No loose vaginal muscles.
4. No baggy eyes from lack of sleep.
5. A nice wardrobe with no food stains.
6. Time to talk with friends on the phone without interruptions.
7. A tidy house.
8. Money in the bank.
9. Mental stimulation that goes beyond Sesame Street.
10. Fingerprint-free car windows.
11. Exotic, ethnic meals in nice restaurants.
12. Adult songs that run through your mind instead of "I love you, you love me..." sung by a purple dinosaur.
13. Uninterrupted sex time without worrying about waking up the kids.
14. Eight hours of deep sleep.
15. Real vacations.
16. Presents. Usually, it's "Don't bother to get me anything. Just buy stuff for the kids."
17. No guilt or anxiety about your mothering skills that might produce a sociopath.
18. Your own sense of self intact.
...you get the picture. But you already know all of this. When moms make you feel as though you're missing out, smile and think, "Oh no. YOU'RE missing out."
Then, catch an episode of Nanny 911 and know you made a good decision.