From SPhone Software:
Ready to know the rules...when prompted, you have to kiss smoothly and gently with your own mouth the iPhone surface (hey, not in the back face). With two or three seconds is enough, you can stop kissing ... not abuse. (caution!) We recommend cleaning the screen of the iPhone before kissing it.
"Judge Kiss Free" is a limited version. You can watch "Judge Kiss" videos on http://www.sphonesoftware.com/judgekiss
It is very easy and simple, and your friends are going to enjoy with you.