two finger blowout

When one partner simply takes 2 fingers unexpectedly. Then the other partner receives 2 fingers shoved in the butthole and then proceeds to have explosive diarrhea.

She was in the doggy position a waiting his cock, when he surprisingly shoved 2 fingers in her butthole and explosive diarrhea occurred. With great excitement he jumped up and yelled, "Yes! That's what I call a two finger blowout".