I think the plot is about a sex maniac. I saw only the beginning of this film on Russian TV in the early 90s. It was definitely a foreign film (I'm almost sure American) and as I remember it looked like late 80s or early 90s film, not older.
A man (who looks like a beer-drinker, I thought that the actor was John Goodman but I looked through his filmography and haven't found a film that fits) calls a radio station and says something like "I am not so young, girls don't like me any more".
The next scene is showing him in a bar meeting a girl, he goes to buy her a drink but when he returns she's with another man, a better looking one. I changed the channel, then a few minutes later I returned to the movie. The scene was: that girl is in bed with the handsome guy and our hero stands by the bed pointing a pistol at them. Then he tries to give pistol to this man (well to the handsome one which is in bed) and says "C'mon, kill me!" and that guy shivers and doesn't take the pistol.
That's all, I don't remember anything more.