"Small penis" is a euphemism/metaphor to describe men who act like obnoxious douchebags because they're compensating for some undisclosed physical/psychosocial/emotional insecurity.
Can anyone provide reasons why men intentionally equip their cars with ear-damaging, bone-rattling, illegal decibels of obnoxious maddening noise? This accomplishes nothing for them other than everyone hating them and labeling them as douchebags. People like that are the reason I intentionally do not own a gun because I would lose control with it the first time a car like that comes within my sight.