I don't understand

Love is beautiful! I know that! I see that! I have been there! However, sometimes I feel like love makes you want to puke. Today, at the children's section in the library was quite repellent. The reason why is because two teenagers were "making out" (lack of better terms) in the library in front of children. I mean the children don't really understand what's taking place but it intrigues their interest. They are just kids and very very very curious. Countless parents began to complain and came to me for guidance. I did not know what to say and just ended up reporting it to another librarian. She, immediately, escorted the teenagers out of the library. However not before they engaged in an interesting conversation. The teenagers were saying that and I quote, "we are in love." The librarian and I quote said, "not in front of the children." So, this went of for a couple of minutes and the children sought their parents' thought. "Mom, why are they fighting?"

"Is it bad to kiss?" This turned into a controversial argument and I couldn't help but think about their actions; both the librarian and the teenagers. I mean the teenagers were "in love" and wanted to show this devotion to each other. In fact, I was stacking books on the shelves when they began to talk and just kiss each other on the cheek. They were playing with their fingers and giggling at each remark. There was nothing going on! However, I can also understand the parents' concern. The parents did not want their children to see any kind of interaction between men and women after a couple of years. I don't know who was at fault here but I will leave this argument up to the readers. Who do you think was at fault here?