Japanese medical equipment maker Nipro has built a gadget that can measure your stress levels through your saliva. The Cocoro Meter measures the level of amylase, a digestive enzyme found in pancreatic juice and saliva that increases when people are under stress.

To use the Cocoro Meter, you simply hock a loogey onto a chip and put it into the gadget for reading. The machine gives you a reading in the form of a number and a happy stick figure.

The meter currently is on sale in Japan for 19,800 Yen or roughly $164.

Finally, we’ll have some proof for our wives and girlfriends that we really are under a lot of stress.