Probably a Pretty Good Rule

As we watched Shrek and Fiona give each other a kiss tonight, Ben started chuckling and said, "Mom, can I tell you one of my rules at school?"  Wondering what kissing and school rules had to do with each other at the kindergarten level, I asked him to continue.  "No kissing allowed!"  

Well, that certainly sounds like a good rule to me, but I was curious as to who was doing this kissing in order for the rule to have been made, pointed out, and enforced.  I figured some girl was the culprit (you really can't trust those girls, you know.)  When I asked him who was kissing people, he said, "Well, Johnny kisses just about everyone."  Johnny is the guilty party here?  I was not expecting that one.