A riddle

[marisca]

When you pee overboard in the same pool does the water level go up or down?

[Nick]

When you pee overboard in the same pool does the water level go up or down?

Depends on the specific gravity of your pee.

Usually no difference.

[marisca]

You've missed out temperature effects and the vapour pressures of the liquid constituents and, of course, whether the peeer farted at the same time.

[claymore]

The Duchess when pouring the tea,
Asked "Do you fart when you pee?"
I replied with some wit,
"Do you belch when you sh*t?"
And I think that was one up to me