By the will of the writers, they also kiss. Anime people are basically the same as us, well, except that the eyes are bigger, the bodies are better and some still have magic.
Scientists out there say that kissing strengthens the immune system, let's take their word for it, thank you very much. People love to kiss, people kiss each other for any reason, people attach too much importance to kissing or kiss everyone in a row just because they feel like it. Drawn or not, kissing is still one of the most important actions in a person's life.
