Is it harder to urinate on Pike’s Peak (14,000 feet) than at sea level, because of the reduced gravitational pull? Does velocity increase with gravity?

What about in the space station or space shuttle, where there is essentially no gravity?

What about peeing in the ocean while scuba diving, because the body is being pushed towards the surface because it has less density than the water? That’s sort of working against gravitational pull.

What’s the effect?