An Negativeboner happens mainly when a man is exercising and requiring blood flow to go to other part of his body besides his penis. This does not happen to all men. The guy's dick shrinks up to the size it was when he was 3, and sticks straight out, making a prominent small bulge in pants like gym shorts or swimsuits. This happens to men of all sizes (penis wise) and is really embarrassing and aggravating. They mainly occur during high weight or high intensity workouts, or cardio.
Bob was doing 500pound squats in the school gym. all the girls were watching. When he put the weight back, OH NO! he had a Negativeboner and everybody could see how tiny his dick was at that moment. Bob was extremely humiliated and now everyone thinks he has a baby penis. Bob knows his dick is actually a bigger than normal size. He just wishes everybody else knew that...