When you are having rough Anal sex until the person receiving it has to diarrhea. When the diarrhea comes the person does a handstand shooting poop all over, looking like a Volcano

The action of receiving multiple samples of jism from a selection of donors and then 'blowing' like a volcano

A very dangerous sex move. First, you take the onion volcano from a hibachi restaurant, put it on your companion's asshole. Then, squirt lighter fluid in their asshole and ignite it with a flame. While the flame is still burning the male inserts their penis into the women or mans asshole for a nice warm, burning sensation.

When your partner is laying on the ground with only their shoulders touching, holding their legs to their head, while you proceed to have anal sex. Once you ejaculate in the rectum you grab their legs and thrust forward to the head making the semen shoot out of the anus like a volcano.

The best part of hibachi when the chef makes a small stack of raw onion rings, puts vegetable oil in it, and lights it on fire whilst it expels steam and flames, like a volcano. (Hence the name).

When you cum after 6 months

Prior to giving a hand job, the female slits her wrists with a razor, scissors, knife, keys, etc. When the hand job is being given, the blood flows onto the penis. The man then ejaculates, propelling both blood and semen into the air. The liquid then cools and dries and becomes igneous rock.