Why did her touch made my cheek tingle?

I was chillin in a friends dorm room and one of my female friends saw me lying on my friends bed so she came in not saying a word to him or me just stared at me then came closer she bent down and pressed her cheek against mine and she goes hello my friend. It made my cheek tingle like why did it do that?

Why did her touch made my cheek tingle?
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