Last night I had a funny dream. In my dream, my sister and I were walking outside, near a school. We heard the children in the school singing a song called, "A Bicycle Built for Two". It's a very sweet song that my mother used to sing to me when I was a little girl.
In the dream, I started singing the song too, loudly, as my sister and I walked down the street. My poor (かわいそうな) sister was very embarrassed (恥ずかしい), and she told me, "Please be quiet! You're embarrassing me!" But other people on the street also started singing, so I didn't stop.
Here's the song. It's a sweet love song. A man who is not rich is proposing (プロポーズ) to his sweetheart. He can't afford (doesn't have enough money) to hire (借りる ）a carriage （馬車) for their wedding. But he is sure that she will "look sweet on a bicycle built for two" (二人乗り自転車). 
This video shows the lyrics (歌詞), so why don't you sing along with it. Don't be embarrassed! 