I like to play with words. So I often change the lyrics to songs as I sing along. I generally don't do a full parody, but just a changed line or word here and there. One example is the line "I wanna wake up in a city that doesn't sleep" from "New York, New York."
But now whenever I hear the opening of "(They Long To Be) Close To You" it goes through my brain as "Why do birds fall out of the trees / Every time I skin my knees." And when I think of "Afternoon Delight" my brain wants to hear "Strawberries in flight."