Howdy, and here is the answer: I use a penis pump, and has discovered the pleasure of water pumping. Fill the pump with ca half with pleasureably hot water. Remember the pump is airtight and watertight. You can waterpump in your sofa without spioiling water, no problem. Water pumping is great, i think the pressure is exceeded more in all directions, and you dont get the donut-effect. One time i had a bit warmer water than before, I noticed bubbles at the base coming up. Thought it was a leackage, but of course the water was boiling at this temperature with the vacuumed airpressure above the surface.
| 
