I caught a glimpse of a movie when I was younger, and the scene that I saw has cought my curiosity since then. I have no idea what the movie is called or who played in it, or even when it was made.
I have the description of one scene that I saw and an approximate time frame it was made.

The only thing I remember is there was a woman going down on a man in a parked car in the driveway and her husband was sneaking in on them in his car and he cut out the headlights and wasn't able to stop in time and ended up running into the back of the other car. When that happened, the lady bit off the mans penis.

That's all I remember and I'm thinking it was made in the 80's sometime, but I'm not real sure on that I'm just going on my approximate age at the time I saw this.

Can anyone help me with the title of this movie?

It might be the World According to Garp.

Thank you, after looking it up and reading the storyline, it could be it. I thought I remembered Robin Williams playing in the movie, but I wasn't sure. Thanks again!