"Boy, Can you Boy?"

One day, I had to replace a part-time lecturer to teach a group of semester one students. I decided to explain to them about the different parts of speech i.e. nouns, verbs, adjectives and adverbs. To ensure they fully understood the lesson, I came up with a few activities that involved all of the students in the class. I was happy when they seemed to be confident with their answers. They even managed to provide me with correct examples of verbs. I spent the rest of the hours explaining to them the other parts of speech. Just before I end the class, I thought of testing their understanding again. I always like some kind of reassurance. So I wrote on the whiteboard the sentence: 'The boy is clever' and asked them which word class does the word "boy" belongs to? To my surprise the students shouted out "verb"! I asked the one who answered the loudest, "can you sing?"...he confidently replied, "yes". I continued to ask him, "can you eat?" and he gave the same reply. I asked him, "can you play?" and he straightaway replied, "yes". Then I popped him the question, "so, can you boy?"....with a quizzical expression he turned to face his friend. For a moment there was a complete silence. Nobody dared to say anything. I waited patiently for his answer. He then turned to face me and with an innocent look and shakily answered... "no madam, i like women" :P