lindt chocolates

Does anyone else ever wonder why the inside of the Lindt chocolates are deliciously cool? I do not buy any other types, so I have no idea if they are all like that, but the milk chocolate ones are..... why is the inside creamy chocolate center cooler than the outside chocolate? And why does it make me so happy as it dissolves in my mouth? How does it stay cold the entire time? That doesn't even make any sense.. does it? However, I will continue to enjoy the special delicious coolness as long as possible... sparingly of course since they are a tad pricey..... and I shall continue to be happy about it.. blissfully happy.... until they are gone and I forget about them til next Christmas... although I don't know why I don't enjoy them outside of Christmas.. I mean they are not really Christmas chocolate...  just like Chocolate Crinkles... not a Christmas cookie per se, yet I only make them at Christmas time.... why?..... I love them, they are one of my favorite cookies.... anyway....  back to chocolate.... if you have not tried this candy and experienced the phenomenon.... give it a try... see if you are as amazed as I.... and just try not to be happy... it won't work.... cool chocolate... what could be happier??