diamond nipples 

When your nipple is so hard it could cut diamonds

My nipples are so hard I have diamond nipples

diamond nipples by Blastmastr644 March 13, 2015

diamond cutting nipples 

nipples so sharp, they can cut diamonds. Diamonds, as you all know, have a strong covalent bond between its atoms, therefore making it one of the hardest things on earth. However, not even diamonds can withstand the magnitude of greatness in these nipples.

Person1: oh man, it sure is cold.
Person2: my nipples are so cold due to the low temperature, they are like diamond cutting nipples.

diamond cutting nipples by it's raining where i live May 4, 2010