That's a refreshing swim on a hot summer's day you're thinking of there Tommy - not quite the same thingYeah I just did a bit of googling too. Definitely contradictory but it looks like it has been dismissed more in the last couple of years. It makes sense to me that it does what an ice pack does essentially on a larger scale. But this seemingly can also have a possible negative long term effect.
I would probably give it a go myself though to see if it worked for me. Maybe in mid August though...