Yeah. It sounds.
The delivery is a completely different thing.
I would like to see the numbers.
Urethral temperature readings.
Readings would be interresting and comparing them to previous data from conductive heat experiments. I would believe constantly hot water would result slightly higher urethal temperatures because water is such outstanding heat conductor. Optimal temperatures cannot be reached because not much over 41 C is highest tolerable water temperature to skin and urethal temperatures are something lower.
What if one has fever and body temperature is 40 C. Would that be great time to do PE? :D