I found this little analogy I heard once very amusing....and quite true!
If your 1st child drops their dummy, it gets sterilised and boiled before being put back in thier mouths
2nd child will get a rinse under the tap
3rd child will get a wipe on the shirt
4th child will get a clean from the dog!!!
SOOO TRUE!!!

But hun, if you don't like ppl touching her, just say so. That might seem rude to some ppl, but other will understand. And she's YOURS. If you really don't want her touched, throw a blanket over the pram just as you enter the store. That way ppl won't be AS inclined to look and touch.

Or you can say: "Please don't touch her ... she has *insert scary illness here"