I am admitting nothing here. These are simply educated guesses.

"If foreskin is removed, does this decrease the likelihood of urination accidents?"

I have no information on the likelihood, but it certainly does not eliminate them.

Keeping very very clean can decrease the number of sprays, split streams and sideways trajectories. But one sometimes forgets or does not have time to wash off the sweat and stuck on hair before going.

Then there is peeing after sex.