The act of being so aroused that upon fully grasping the hideous/repulsive reality of the situation; against the spurter'z will, the outward force of what would be ejaculation (Expurtz) continues, but in an inward fashion; thus resulting in the phenomenon that we scientists like to refer to as "inspurting." Such levels of disgust also cause the male genitalia to recede into one's own pelvic region/lower stomach.