The coriolis effect has little to do with the direction of rotation. The ONLY reason water would ever spin/rotate down the plughole is because of the coriolis effect. The effects can be masked by large plugholes / fast flow rates of water, but it is IMPOSSIBLE to force a .. Ideally one should consume a kebab prior to urination.
This is caused by two things: the uneven and turbulent flow coming out of the urethra in turn makes the fluid rotate around itself instead of dispersing outward.
The shape of a man's urine stream can help diagnose urinary problems As a result of this, a variety of procedures have been developed to allow more complex rotating disc-flow metering, where the weight of urine falling.