I'm your penis, I'm on fire with pure desire.

The story:

I was always extremely embarassed by this song, and would turn it off if my parents were home (I was at the wonderfully uncomfortable age of 15 - 16 years old). However, I secretly enjoyed the song because the girls who sang it were hot.
Once I got to college, I was going someplace (I think it was a record store) with a female classmate, when I saw, in her car, a copy of the album (well, cassette tape). I mentioned to her that I wanted to hear the song called "Penis". She, of course, looked at me very strangely, and asked me what it sounded like, so I sang her the chorus.
She became so hysterical that she had to pull the car over to the side of the road. Then, she opened the cassette insert and showed me the correct lyrics for "Venus".
I avoided her for the rest of my stay in college!