And that comment was ok because.........??

So I am at Walmart yesterday will 5 children. (I know I am brave huh??) 3 of mine, and 2 others that are younger than mine. They all have blonde hair and COULD belong to me, but I was just babysitting the other 2. So a lady comes down the aisle and passes me. She then proceeds to back up her cart and say, "I have to ask, are all of these YOUR children??" I said no that the 2 younger ones were not. She then says, "Well, I was going to say - there is such a thing as birth control and I could tell you how to use it." Ummmm........WHAT???? Why is my birth control or lack thereof and of HER business??? Well, to answer it isn't. Her question irritates the fire out of me, but what was the MOST upsetting was MY response. I chuckled and smiled!!!!!! It makes me mad just thinking about it. I wish I would have said, "There is such a thing as manners and I can tell you how to use them." Of course this is a good 20 minutes after the fact that I think of this cute little dig to say. UGH!!!! Next time I am going to wear a sign that says MY SEX LIFE IS NONYA BUSINESS!! Or would that be trashy?? :)