Why is this a thing?

I have two small children and for the second time I have experienced something that completely baffles me. I was in a store for the first time and getting food the second time. Both times I was just minding my business and a random lady (not the same lady at both places) comes up to me and says how cute my kids are and then tries to touch them. I know it's probably coming from an innocent place and they just genuinely think my kid is cute/git kids of their own. But imagine if a man did the same exact thing. I feel that people would intervene /it would be seen as creepy. Why is it not considered creepy just because it's a lady? The kids are too little to give consent and both times they never ask me if they can. I just feel it's very weird and almost an entitled attitude to think that you can just do that. I just needed to vent and see if people share my opinion/ have thoughts on the situation.

Why is this a thing?
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