Identifying a post-apocalyptic movie, perhaps about a world with no women, containing a memorable scene [closed]

I am building up a collection of movies based in the future and there's one I saw about 20 years ago. However, I do not know how old the movie was when I saw it, so the best I can tell you is that it was produced at least 20 years ago.

What do I recall about this movie?

• It was set in the future (although whatever year in the future may not necessarily be 'our' future now.
• It was set in the United States, in some sort of post apocalyptic environment.
• This future may or may not have had women in it.

Let me explain the third bullet point to give some context, as there was at least one female character. I remember a scene in the movie that goes something like this:

A man and woman (probably the main characters) come across some location, seeking help I think, and when they get there the man they are speaking to agrees to help them if he can have sex with the woman because they haven't seen a woman for a long time. In the scene, the man accompanying the woman goes to attack the other man, but the woman says it's alright, she'll do it. So she and the other man go into a room and the only thing you see is her asking him "how do you want me"? The movie then progresses from that point as if nothing happened.

So, this scene leads me to believe that women were rare in this post apocalyptic future.

I'm also hoping the above scene itself may be enough to identify the movie (usually you would see the woman getting out of this situation somehow - but in this one she just complies because they need his help!). For this reason I believe this scene stands out from other movies.

Other possible factors to help identify the movie are:

• because it was set in the future, it may have been a science-fiction movie
• because it was set in the United States, it was probably an American movie

I have tried identifying this movie through other means, but have had no luck. One suggestion offered to me at another Stack Exchange site was that it may have been Waterworld. However, I can confirm this was not the movie.

Any suggestions?