Just like us, the very thing we dwell upon has pimples too. Volcanoes apear in many shapes and sizes on the face of the Earth with no clear way to dispose of them.
When your partner ejaculates in your ass, giving you an anal cream pie, that results in an eruption of cum followed by shit immediately after he removes his penis.
a sexual act in which one partner is upside (via handstand or being held upside down by another) and projectile diarrheas in the air, like a volcano erupting, while the other partner awaits below to have the diarrhea rain upon them like hot lava