I would like her to help me buy a perfume, is it a bad idea?

I like this girl and i made it clear, this is our second date and I'd like to ask her out to help me buy a perfume, then get an ice cream and go for a walk while we keep talking a getting to know each other, it is a bad idea. Further ideas or things to do are welcome
I would like her to help me buy a perfume, is it a bad idea?
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