Bukkake is an orgie in which several men masturbate and ejaculate, one after the other or all at the same time, onto one person in the middle. The practice apparently started in Japan where the name bukkake comes from a noodle dish with sauce poured all over it. Many men imagine Bukkake as a form of Humiliation, and many orgy-focused Porn films will end with a bukkake round. Some people find it highly arousing to make several men cum at once. It's gratifying to see how many men you can get to orgasm. So who really has the power in this situation? Sometimes the person in the middle even decide when and where guys are allowed to come. Like messy sex? Then check out these other links: Group Sex, Masturbation, Cum Swallowing
A cum shot (sometimes called facials) is called this for obvious reasons in the porn industry. This is the scene, usually the end shot, where a man ejaculates on his partner's face. Lots of porno films like to feature men’s orgasms in this way. He pulls out just before cuming and jizzes onto the face of his partner. But not every time, sometimes cum shots include an open mouth, onto a foot, chest, abdomen, ass, or genitalia.