Is this appropriate for an older man to say to a young girl or was he drunk?

So I was working as a cashier and getting food orders ready and some guy walks in and I tell him that his food will be ready in 5 more minutes and once he comes he picks his food then walks in again asking for some napkins and I hand him some and he says "thank you little sweetie" is he crazy?
Is this appropriate for an older man to say to a young girl or was he drunk?
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