Beside the pure medical aspect of using catheter, some (like me) will use it to feel incontinent, wearing diapers or not.
One aspect of wearing a cath can also be some kind of humiliation, not having control of a so basic function like holding pee. But having a cath inserted disable all feeling of urge, or dripping. Then I try that little mod since few weeks, and it work really great!
While inserting the catheter, I pinch the tube and cut a hole at first 1/3d of the length, being very carefull to not cut the inflation channel on one side. After the cath is fully inserted, the balloon is inflated as usual, but the main channel will stay closed. That way, dripping will pass the little hole inside the urethra, and you feel each drip. The better is that when feeling some urine going away, you'll try to hold it, but it does exactly opposite, by making more pressure and pushing more fluid out!
No need to say that diapers are now the only way to prevent leaks!
Some pictures here on my album.