Why do i have to urinate using a catherder? every time i need to empty iv to insert it into my penis. why is this?

Here are some ...: Clean intermittent self-catheterization (CISC) is the most beneficial & effective way to regularly drain / empty bladder for all persons, who cannot naturally empty their bladder, if done correctly / timely although bacteriuria will expectedly occur. The causes for inability to empty usually result from injury to bladder muscle or/and its nerve control; very occasionally, no reason could be found.