See if any of this makes sense: Marty Rackham is a screenwriter/undersea-treasure-hunter who goes diving with his father- in-law to be Dick Van Patten, gets attacked by sharks, left for dead, become a New York City stand up comic, meets with his brother/narrator, incurs the wrath of The Riddler, goes to the Caribbean, is seduced by Priscilla Barnes (ewwwww) etc.
"Body Trouble" is an inept crapfest with no comic timing. It's one of those comedies that decides sex equals humor. The plot is all madcap nonsense which is not rare for a comedy but even a comedy can't get away with it if it isn't funny.
There is nothing believable here, nothing seems real, so really there's no basis for any of the weak jokes. For example, the viewer is expected to believe that the characters find Priscilla Barnes sexy. Who the hell would even dare to kiss that creature? An ugly blonde in a red dress and lipstick is still ugly. By the same token, Rackham is no good as a stand up comic, his timing sucks. The movie sucks, if I haven't made that clear yet. The production quality is fitting for softcore porn, but the sex isn't much better than the jokes, so this movie can't work on that score either.
There are twists and such as well, and a murder plot, but it's all just part of the mess.