When you are so happy that you are willing to give chocolate to the person to thank someone. You cannot afford, you don't want to or you don't now how to buy chocolate. Instead, you send a mental and spiritual box of chocolates to the person. The person is satisfied because it's the intention that counts. You can say it to the person, write it or send it telepathically. The last one is preferable because it has a deeper meaning and it penetrates the soul.
Jonathan: You're beautiful in tabarouette.
Alex: Thank you in chocolate.