Can someone explain why this works?

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By the way, don't ever let science ruin a potential romance.
 
Mazulu said:
By the way, don't ever let science ruin a potential romance.
Word.
 
Mazulu said:
Did you account for the other person's body heat? Does it still work if the other person has cold hands?
Or have the other person wear heavy gloves, to insulate the copper from heat conducted by contact with their hands.