This looks (and smells) like real acrylic paint, so i'm not sure the kiss tasted very good. But those two are probably too drunk to care!
Photo taken at the 2011 Bay to Breakers footrace and street festival (San Francisco).
Photos taken at the Bay to Breakers footrace and street party (San Francisco)
For more information, read: en.wikipedia.org/wiki/Bay_to_Breakers