Comes through the bladder, but isn’t pee. They did an ultrasound study where women emptied thier bladders and then stimulated until they squirted. Thier bladder is empty of urine, but rapidly fills and releases a clear fluid to squirt.
If the lady doesn’t empty her bladder first, it’s going to have urine in it. But the fluid itself isn’t urine.
The focus seemed to be on picturing the table and ball, and the person pushing it was irrelevant other than to provide motive force, so I didn’t spend any time to fill in their details.