A perverted example is that I took a class called Parasites, and the teacher was all good when talking about tapeworms, schistosomiasis, and mites, but I met him when he was talking about Trichomonas... He had a pot-shaped head, a high nose, and one or two cute pimples on his fair and rosy cheeks. He didn't bring a book, so he sat next to me and drank Wong Lo Kat, which I thought was Coca-Cola at first.