The basic premise of the movie is that there is a Halloween mask that makes guys have sex with each other. Most of the story is told as a series of flashbacks when three elderly men are bragging to each other about their sexual exploits.
While the implication is that there is wicked voodoo afoot, there is very little in the way of horror content. However, there is a very short 'vampire' scene during a Halloween party. The vampire is a guy in a vampire costume that does it with another guy.
The movie as a whole is tough to watch, unless you're into much older men, because as soon as a sex scene ends, it cuts to the men reminiscing. The end shows the men who believed in the voodoo potion getting their wish or returned youth.
