For months, I've been trying to figure out what these 2 movies were. My dad had them recorded on the same tape, so I'm assuming they're from the same time. I saw the movies somewhere around 1998, but I'd guess they're from the late 70s or early 80s.

In one of them, the main character is a black woman. Her husband is shown numerous times on a boat. At some point, it crashes into some rocks and blows up. The woman screws a bunch of different people. She's rides around naked on a horse a couple times. I can't even remember if it was in English.

The second one is definitely European. I think it was Norwegian or Swedish maybe. I don't remember much about it. The opening scene is of the main character getting screwed on a table with a light bulb swaying back and forth above them. Later, she goes to a movie theater and gives a guy a handjob. And I remember nothing more about it.

If anyone has any ideas, I'd be very appreciative.

These both sound like russ meyer films. American films of the 60's and 70's. The second description sounds like 'UP' (not to be confused with the disney film)! The first is also russ meyer but it's hard to pin point which one without watching them again as they all involve lots of screwing around as you described, with crazy shots such as naked women on horses. They do look like european films though

I think I can help a little thanks to ant71175

UP!
http://www.imdb.com/title/tt0075376/

For the other, try here, see if you recognize a name or part of a name or maybe the cover etc.
Just go down the list look at each and figure out if the last one is the one you're looking for.

http://www.imdb.com/name/nm0000540/